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, 72 insertions, 49 deletions

diff --git a/ports/libsbml/CONTROL b/ports/libsbml/CONTROL
deleted file mode 100644
index 654ea75bd..000000000
--- a/ports/libsbml/CONTROL
+++ /dev/null
@@ -1,49 +0,0 @@
-Source: libsbml

-Version: 5.18.0

-Description: A library for reading / writing SBML files

-Default-Features: expat,comp,fbc,groups,layout,render,libxml2

-Supports: !uwp

-

-Feature: test

-Description: Unit testing of libSBMLs implementation

-Build-Depends: check

-

-Feature: bzip2

-Description: bz2 compression support for libsbml

-Build-Depends: bzip2

-

-Feature: zlib

-Description: gzip compression support for libsbml

-Build-Depends: zlib

-

-Feature: expat

-Description: libsbml using expat parser

-Build-Depends: expat

-

-Feature: libxml2

-Description: libsbml using libxml2 parser

-Build-Depends: libxml2

-

-Feature: comp

-Description: support for Hierarchical Model Composition

-

-Feature: fbc

-Description: support for Flux Balance Constrant Modeling

-

-Feature: groups

-Description: support for Groups

-

-Feature: layout

-Description: support for Pathway Layouts

-

-Feature: multi

-Description: support for Multistate Modeling

-

-Feature: qual

-Description: support for Qualitative Modeling 

-

-Feature: render

-Description: support for Rendering information

-

-Feature: namespace

-Description: Build with the WITH_CPP_NAMESPACE option set to on

diff --git a/ports/libsbml/vcpkg.json b/ports/libsbml/vcpkg.json
new file mode 100644
index 000000000..b67542721
--- /dev/null
+++ b/ports/libsbml/vcpkg.json
@@ -0,0 +1,72 @@
+{
+  "name": "libsbml",
+  "version-string": "5.18.0",
+  "port-version": 1,
+  "description": "A library for reading / writing SBML files",
+  "supports": "!uwp",
+  "default-features": [
+    "comp",
+    "expat",
+    "fbc",
+    "groups",
+    "layout",
+    "libxml2",
+    "render"
+  ],
+  "features": {
+    "bzip2": {
+      "description": "bz2 compression support for libsbml",
+      "dependencies": [
+        "bzip2"
+      ]
+    },
+    "comp": {
+      "description": "support for Hierarchical Model Composition"
+    },
+    "expat": {
+      "description": "libsbml using expat parser",
+      "dependencies": [
+        "expat"
+      ]
+    },
+    "fbc": {
+      "description": "support for Flux Balance Constrant Modeling"
+    },
+    "groups": {
+      "description": "support for Groups"
+    },
+    "layout": {
+      "description": "support for Pathway Layouts"
+    },
+    "libxml2": {
+      "description": "libsbml using libxml2 parser",
+      "dependencies": [
+        "libxml2"
+      ]
+    },
+    "multi": {
+      "description": "support for Multistate Modeling"
+    },
+    "namespace": {
+      "description": "Build with the WITH_CPP_NAMESPACE option set to on"
+    },
+    "qual": {
+      "description": "support for Qualitative Modeling"
+    },
+    "render": {
+      "description": "support for Rendering information"
+    },
+    "test": {
+      "description": "Unit testing of libSBMLs implementation",
+      "dependencies": [
+        "check"
+      ]
+    },
+    "zlib": {
+      "description": "gzip compression support for libsbml",
+      "dependencies": [
+        "zlib"
+      ]
+    }
+  }
+}