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, 43 insertions, 13 deletions

diff --git a/ports/openmvs/CONTROL b/ports/openmvs/CONTROL
deleted file mode 100644
index 6947e9241..000000000
--- a/ports/openmvs/CONTROL
+++ /dev/null
@@ -1,13 +0,0 @@
-Source: openmvs
-Version: 1.1
-Port-Version: 4
-Description: OpenMVS: open Multi-View Stereo reconstruction library
-Homepage: https://cdcseacave.github.io/openMVS
-Build-Depends: zlib, boost-iostreams, boost-program-options, boost-system, boost-serialization, eigen3, opencv, cgal[core], glew, glfw3, vcglib, openmvg[software] (!(windows&static)), libpng, tiff
-
-Feature: cuda
-Build-Depends: cuda
-Description: cuda support for openmvs
-
-Feature: openmp
-Description: openmp support for openmvs
diff --git a/ports/openmvs/vcpkg.json b/ports/openmvs/vcpkg.json
new file mode 100644
index 000000000..74df96ee5
--- /dev/null
+++ b/ports/openmvs/vcpkg.json
@@ -0,0 +1,43 @@
+{
+  "name": "openmvs",
+  "version-string": "1.1",
+  "port-version": 5,
+  "description": "OpenMVS: open Multi-View Stereo reconstruction library",
+  "homepage": "https://cdcseacave.github.io/openMVS",
+  "dependencies": [
+    "boost-iostreams",
+    "boost-program-options",
+    "boost-serialization",
+    "boost-system",
+    {
+      "name": "cgal",
+      "default-features": false
+    },
+    "eigen3",
+    "glew",
+    "glfw3",
+    "libpng",
+    "opencv",
+    {
+      "name": "openmvg",
+      "features": [
+        "software"
+      ],
+      "platform": "!(windows & static)"
+    },
+    "tiff",
+    "vcglib",
+    "zlib"
+  ],
+  "features": {
+    "cuda": {
+      "description": "cuda support for openmvs",
+      "dependencies": [
+        "cuda"
+      ]
+    },
+    "openmp": {
+      "description": "openmp support for openmvs"
+    }
+  }
+}