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, 107 insertions, 29 deletions

diff --git a/ports/wt/CONTROL b/ports/wt/CONTROL
deleted file mode 100644
index 50ae4fbc7..000000000
--- a/ports/wt/CONTROL
+++ /dev/null
@@ -1,29 +0,0 @@
-Source: wt
-Version: 4.5.0
-Homepage: https://github.com/emweb/wt
-Description: Wt is a C++ library for developing web applications
-Build-Depends: zlib, libpng, pango (!windows), harfbuzz (!windows), libharu, glew, boost-algorithm, boost-array, boost-asio, boost-bind, boost-config, boost-container-hash, boost-filesystem, boost-fusion, boost-interprocess, boost-lexical-cast, boost-logic, boost-math, boost-multi-index, boost-optional, boost-phoenix, boost-pool, boost-program-options, boost-range, boost-serialization, boost-smart-ptr, boost-spirit, boost-system, boost-thread, boost-tokenizer, boost-tuple, boost-ublas, boost-variant
-Default-Features: openssl
-
-Feature: dbo
-Description: Wt::Dbo
-
-Feature: postgresql
-Description: Wt::Dbo PostgreSQL backend
-Build-Depends: libpq, wt[dbo]
-
-Feature: sqlite3
-Description: Wt::Dbo Sqlite 3 backend
-Build-Depends: sqlite3, wt[dbo]
-
-Feature: sqlserver
-Description: Wt::Dbo MS SQL Server backend
-Build-Depends: unixodbc (!windows), wt[dbo]
-
-Feature: openssl
-Description: TLS support
-Build-Depends: openssl
-
-Feature: graphicsmagick
-Description: WRasterImage support on non-Windows based on GraphicsMagick
-Build-Depends: graphicsmagick
diff --git a/ports/wt/vcpkg.json b/ports/wt/vcpkg.json
new file mode 100644
index 000000000..7a92d9228
--- /dev/null
+++ b/ports/wt/vcpkg.json
@@ -0,0 +1,107 @@
+{
+  "name": "wt",
+  "version-string": "4.5.0",
+  "port-version": 1,
+  "description": "Wt is a C++ library for developing web applications",
+  "homepage": "https://github.com/emweb/wt",
+  "dependencies": [
+    "boost-algorithm",
+    "boost-array",
+    "boost-asio",
+    "boost-bind",
+    "boost-config",
+    "boost-container-hash",
+    "boost-filesystem",
+    "boost-fusion",
+    "boost-interprocess",
+    "boost-lexical-cast",
+    "boost-logic",
+    "boost-math",
+    "boost-multi-index",
+    "boost-optional",
+    "boost-phoenix",
+    "boost-pool",
+    "boost-program-options",
+    "boost-range",
+    "boost-serialization",
+    "boost-smart-ptr",
+    "boost-spirit",
+    "boost-system",
+    "boost-thread",
+    "boost-tokenizer",
+    "boost-tuple",
+    "boost-ublas",
+    "boost-variant",
+    "glew",
+    {
+      "name": "harfbuzz",
+      "platform": "!windows"
+    },
+    "libharu",
+    "libpng",
+    {
+      "name": "pango",
+      "platform": "!windows"
+    },
+    "zlib"
+  ],
+  "default-features": [
+    "openssl"
+  ],
+  "features": {
+    "dbo": {
+      "description": "Wt::Dbo"
+    },
+    "graphicsmagick": {
+      "description": "WRasterImage support on non-Windows based on GraphicsMagick",
+      "dependencies": [
+        "graphicsmagick"
+      ]
+    },
+    "openssl": {
+      "description": "TLS support",
+      "dependencies": [
+        "openssl"
+      ]
+    },
+    "postgresql": {
+      "description": "Wt::Dbo PostgreSQL backend",
+      "dependencies": [
+        "libpq",
+        {
+          "name": "wt",
+          "features": [
+            "dbo"
+          ]
+        }
+      ]
+    },
+    "sqlite3": {
+      "description": "Wt::Dbo Sqlite 3 backend",
+      "dependencies": [
+        "sqlite3",
+        {
+          "name": "wt",
+          "features": [
+            "dbo"
+          ]
+        }
+      ]
+    },
+    "sqlserver": {
+      "description": "Wt::Dbo MS SQL Server backend",
+      "dependencies": [
+        {
+          "name": "unixodbc",
+          "platform": "!windows"
+        },
+        {
+          "name": "wt",
+          "features": [
+            "dbo"
+          ]
+        }
+      ]
+    }
+  }
+}