Bulk convert control files. (#19986)

```
function Convert-Control {
    Param($full)
    .\vcpkg.exe format-manifest $full
    $root = $full.Substring(0, $full.Length - 7) # CONTROL
    $new = $root + 'vcpkg.json'
    $content = Get-Content -Raw $new
    $asJson = ConvertFrom-Json $content -AsHashtable -Depth 100
    $oldVersion = $asJson['port-version']
    if ($null -eq $oldVersion) {
        $oldVersionFull = $asJson['version-string']
        Write-Host "Got version $oldVersionFull"
        $match = [System.Text.RegularExpressions.Regex]::Match($oldVersionFull, '^(.+)-(\d+)$')
        if ($match.Success -and -not [System.Text.RegularExpressions.Regex]::IsMatch($oldVersionFull, '^\d\d\d\d-\d\d-\d\d$')) {
            $newFullVersion = [string]$match.Groups[1].Value
            $oldVersion = [int]$match.Groups[2].Value
            Write-Host "newFullVersion $newFullVersion oldVersion $oldVersion"
            $newVersion = $oldVersion + 1
            $asJson['version-string'] = $newFullVersion
            Write-Host "Previous version for $full extracted from version field -- setting version-string $newFullVersion and port-version $newVersion"
        } else {
            Write-Host "No previous version for $full -- setting 1"
            $newVersion = 1
        }
    } else {
        $newVersion = [int]$oldVersion + 1
        Write-Host "New version for $full : $newVersion"
    }

    $asJson['port-version'] = $newVersion

    $content = ConvertTo-Json $asJson -Depth 100
    Set-Content -Path $new -Value $content
    .\vcpkg.exe format-manifest $new
}

Get-ChildItem ports\CONTROL -Recurse | Foreach-Object {
    Convert-Control $_.FullName
}

git commit -am "this message"
.\vcpkg.exe x-add-version -all
git commit -a --amend
```

2 files changed, 411 insertions, 125 deletions

diff --git a/ports/magnum-plugins/CONTROL b/ports/magnum-plugins/CONTROL
deleted file mode 100644
index 09eaab782..000000000
--- a/ports/magnum-plugins/CONTROL
+++ /dev/null
@@ -1,125 +0,0 @@
-Source: magnum-plugins
-Version: 2020.06
-Port-Version: 6
-Build-Depends: magnum[core]
-Description: Plugins for magnum, C++11/C++14 graphics middleware for games and data visualization
-Homepage: https://magnum.graphics/
-Default-Features: ddsimporter, icoimporter, miniexrimageconverter, opengeximporter, stanfordimporter, stanfordsceneconverter, stbimageconverter, stbimageimporter, stlimporter
-
-Feature: assimpimporter
-Description: AssimpImporter plugin
-Build-Depends: assimp, magnum[core,anyimageimporter], magnum[core,trade]
-
-Feature: openddl
-Description: OpenDdl library
-
-Feature: basisimageconverter
-Description: BasisImageConverter plugin
-Build-Depends: magnum[core,trade]
-
-Feature: basisimporter
-Description: BasisImporter plugin
-Build-Depends: magnum[core,trade]
-
-Feature: ddsimporter
-Description: DdsImporter plugin
-Build-Depends: magnum[core,trade]
-
-Feature: devilimageimporter
-Description: DevIlImageImporter plugin
-Build-Depends: devil, magnum[core,trade]
-
-Feature: drflacaudioimporter
-Description: DrFlacAudioImporter plugin
-Build-Depends: magnum[core,audio]
-
-Feature: drmp3audioimporter
-Description: DrMp3AudioImporter plugin
-Build-Depends: magnum[core,audio]
-
-Feature: drwavaudioimporter
-Description: DrWavAudioImporter plugin
-Build-Depends: magnum[core,audio]
-#Feature: faad2audioimporter
-#Description: Faad2AudioImporter plugin
-#Build-Depends: magnum[core,audio], faad2
-
-Feature: freetypefont
-Description: FreeTypeFont plugin
-Build-Depends: freetype, magnum[core,text]
-
-Feature: glslangshaderconverter
-Description: GlslangShaderConverter plugin
-Build-Depends: glslang, magnum[core,shadertools]
-
-Feature: harfbuzzfont
-Description: HarfBuzzFont plugin
-Build-Depends: harfbuzz, magnum-plugins[core,freetypefont]
-
-Feature: icoimporter
-Description: IcoImporter plugin
-Build-Depends: magnum[core,trade]
-
-Feature: jpegimporter
-Description: JpegImporter plugin
-Build-Depends: libjpeg-turbo, magnum[core,trade]
-
-Feature: jpegimageconverter
-Description: JpegImageConverter plugin
-Build-Depends: libjpeg-turbo, magnum[core,trade]
-
-Feature: meshoptimizersceneconverter
-Description: MeshOptimizerSceneConverter plugin
-Build-Depends: magnum[core,trade], meshoptimizer
-
-Feature: miniexrimageconverter
-Description: MiniExrImageConverter plugin
-Build-Depends: magnum[core,trade]
-
-Feature: opengeximporter
-Description: OpenGexImporter plugin
-Build-Depends: magnum[core,anyimageimporter], magnum[core,trade], magnum-plugins[core,openddl]
-
-Feature: pngimageconverter
-Description: PngImageConverter plugin
-Build-Depends: libpng, magnum[core,trade]
-
-Feature: pngimporter
-Description: PngImporter plugin
-Build-Depends: libpng, magnum[core,trade]
-
-Feature: spirvtoolsshaderconverter
-Description: SpirvToolsShaderConverter plugin
-Build-Depends: spirv-tools, magnum[core,shadertools]
-
-Feature: stanfordimporter
-Description: StanfordImporter plugin
-Build-Depends: magnum[core,trade]
-
-Feature: stanfordsceneconverter
-Description: StanfordSceneConverter plugin
-Build-Depends: magnum[core,trade]
-
-Feature: stbimageconverter
-Description: StbImageConverter plugin
-Build-Depends: magnum[core,trade]
-
-Feature: stbimageimporter
-Description: StbImageImporter plugin
-Build-Depends: magnum[core,trade]
-
-Feature: stbtruetypefont
-Description: StbTrueTypeFont plugin
-Build-Depends: magnum[core,text]
-
-Feature: stbvorbisaudioimporter
-Description: StbVorbisAudioImporter plugin
-Build-Depends: magnum[core,audio]
-
-Feature: stlimporter
-Description: StlImporter plugin
-Build-Depends: magnum[core,trade]
-
-Feature: tinygltfimporter
-Description: TinyGltfImporter plugin
-Build-Depends: magnum[core,anyimageimporter], magnum-plugins[core,stbimageimporter], magnum[core,trade]
diff --git a/ports/magnum-plugins/vcpkg.json b/ports/magnum-plugins/vcpkg.json
new file mode 100644
index 000000000..d4280e76b
--- /dev/null
+++ b/ports/magnum-plugins/vcpkg.json
@@ -0,0 +1,411 @@
+{
+  "name": "magnum-plugins",
+  "version-string": "2020.06",
+  "port-version": 7,
+  "description": "Plugins for magnum, C++11/C++14 graphics middleware for games and data visualization",
+  "homepage": "https://magnum.graphics/",
+  "dependencies": [
+    {
+      "name": "magnum",
+      "default-features": false
+    }
+  ],
+  "default-features": [
+    "ddsimporter",
+    "icoimporter",
+    "miniexrimageconverter",
+    "opengeximporter",
+    "stanfordimporter",
+    "stanfordsceneconverter",
+    "stbimageconverter",
+    "stbimageimporter",
+    "stlimporter"
+  ],
+  "features": {
+    "assimpimporter": {
+      "description": "AssimpImporter plugin",
+      "dependencies": [
+        "assimp",
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "anyimageimporter"
+          ]
+        },
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "basisimageconverter": {
+      "description": "BasisImageConverter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "basisimporter": {
+      "description": "BasisImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "ddsimporter": {
+      "description": "DdsImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "devilimageimporter": {
+      "description": "DevIlImageImporter plugin",
+      "dependencies": [
+        "devil",
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "drflacaudioimporter": {
+      "description": "DrFlacAudioImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "audio"
+          ]
+        }
+      ]
+    },
+    "drmp3audioimporter": {
+      "description": "DrMp3AudioImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "audio"
+          ]
+        }
+      ]
+    },
+    "drwavaudioimporter": {
+      "description": "DrWavAudioImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "audio"
+          ]
+        }
+      ]
+    },
+    "freetypefont": {
+      "description": "FreeTypeFont plugin",
+      "dependencies": [
+        "freetype",
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "text"
+          ]
+        }
+      ]
+    },
+    "glslangshaderconverter": {
+      "description": "GlslangShaderConverter plugin",
+      "dependencies": [
+        "glslang",
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "shadertools"
+          ]
+        }
+      ]
+    },
+    "harfbuzzfont": {
+      "description": "HarfBuzzFont plugin",
+      "dependencies": [
+        "harfbuzz",
+        {
+          "name": "magnum-plugins",
+          "default-features": false,
+          "features": [
+            "freetypefont"
+          ]
+        }
+      ]
+    },
+    "icoimporter": {
+      "description": "IcoImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "jpegimageconverter": {
+      "description": "JpegImageConverter plugin",
+      "dependencies": [
+        "libjpeg-turbo",
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "jpegimporter": {
+      "description": "JpegImporter plugin",
+      "dependencies": [
+        "libjpeg-turbo",
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "meshoptimizersceneconverter": {
+      "description": "MeshOptimizerSceneConverter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        },
+        "meshoptimizer"
+      ]
+    },
+    "miniexrimageconverter": {
+      "description": "MiniExrImageConverter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "openddl": {
+      "description": "OpenDdl library"
+    },
+    "opengeximporter": {
+      "description": "OpenGexImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "anyimageimporter"
+          ]
+        },
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        },
+        {
+          "name": "magnum-plugins",
+          "default-features": false,
+          "features": [
+            "openddl"
+          ]
+        }
+      ]
+    },
+    "pngimageconverter": {
+      "description": "PngImageConverter plugin",
+      "dependencies": [
+        "libpng",
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "pngimporter": {
+      "description": "PngImporter plugin",
+      "dependencies": [
+        "libpng",
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "spirvtoolsshaderconverter": {
+      "description": "SpirvToolsShaderConverter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "shadertools"
+          ]
+        },
+        "spirv-tools"
+      ]
+    },
+    "stanfordimporter": {
+      "description": "StanfordImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "stanfordsceneconverter": {
+      "description": "StanfordSceneConverter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "stbimageconverter": {
+      "description": "StbImageConverter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "stbimageimporter": {
+      "description": "StbImageImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "stbtruetypefont": {
+      "description": "StbTrueTypeFont plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "text"
+          ]
+        }
+      ]
+    },
+    "stbvorbisaudioimporter": {
+      "description": "StbVorbisAudioImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "audio"
+          ]
+        }
+      ]
+    },
+    "stlimporter": {
+      "description": "StlImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        }
+      ]
+    },
+    "tinygltfimporter": {
+      "description": "TinyGltfImporter plugin",
+      "dependencies": [
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "anyimageimporter"
+          ]
+        },
+        {
+          "name": "magnum",
+          "default-features": false,
+          "features": [
+            "trade"
+          ]
+        },
+        {
+          "name": "magnum-plugins",
+          "default-features": false,
+          "features": [
+            "stbimageimporter"
+          ]
+        }
+      ]
+    }
+  }
+}