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, 38 insertions, 18 deletions

diff --git a/ports/ogre-next/CONTROL b/ports/ogre-next/CONTROL
deleted file mode 100644
index f2ebbddaf..000000000
--- a/ports/ogre-next/CONTROL
+++ /dev/null
@@ -1,18 +0,0 @@
-Source: ogre-next
-Version: 2019-10-20-1
-Build-Depends: zlib, freeimage, freetype, rapidjson, openvr, boost-thread, boost-date-time, poco, tbb, sdl2, tinyxml, zziplib
-Homepage: https://github.com/OGRECave/ogre-next
-Description: Ogre 2.1 & 2.2 - scene-oriented, flexible 3D engine written in C++
-
-Feature: d3d9
-Description: Build Direct3D9 RenderSystem
-
-Feature: csharp
-Description: Build csharp bindings
-
-Feature: java
-Description: Build Java (JNI) bindings
-
-Feature: python
-Description: Build Python bindings
-Build-Depends: python3
diff --git a/ports/ogre-next/vcpkg.json b/ports/ogre-next/vcpkg.json
new file mode 100644
index 000000000..a729f0bfd
--- /dev/null
+++ b/ports/ogre-next/vcpkg.json
@@ -0,0 +1,38 @@
+{
+  "name": "ogre-next",
+  "version-string": "2019-10-20",
+  "port-version": 2,
+  "description": "Ogre 2.1 & 2.2 - scene-oriented, flexible 3D engine written in C++",
+  "homepage": "https://github.com/OGRECave/ogre-next",
+  "dependencies": [
+    "boost-date-time",
+    "boost-thread",
+    "freeimage",
+    "freetype",
+    "openvr",
+    "poco",
+    "rapidjson",
+    "sdl2",
+    "tbb",
+    "tinyxml",
+    "zlib",
+    "zziplib"
+  ],
+  "features": {
+    "csharp": {
+      "description": "Build csharp bindings"
+    },
+    "d3d9": {
+      "description": "Build Direct3D9 RenderSystem"
+    },
+    "java": {
+      "description": "Build Java (JNI) bindings"
+    },
+    "python": {
+      "description": "Build Python bindings",
+      "dependencies": [
+        "python3"
+      ]
+    }
+  }
+}