Update Ubuntu documentation to include mono web-server (#2892)

* Update Ubuntu documentation to include mono web-server

* apply to Ubuntu 20.04 only

images/linux/scripts/SoftwareReport/SoftwareReport.WebServers.psm1

@@ -28,14 +28,34 @@ function Get-NginxVersion {
     }
 }
 
+function Get-Xsp4Version {
+    $name = "mono-xsp4"
+    $port = (grep '^port=' /etc/default/mono-xsp4).Split('=')[1]
+    $version = (dpkg-query --showformat='${Version}' --show mono-xsp4).Split('-')[0]
+    $serviceStatus = systemctl show -p ActiveState --value mono-xsp4
+    $configFile = "/etc/default/mono-xsp4"
+    return [PsCustomObject]@{
+        "Name" = $name
+        "Version" = $version
+        "ConfigFile" = $configFile
+        "ServiceStatus" = $serviceStatus
+        "ListenPort" = $port
+    }
+}
+
 function Build-WebServersSection {
+    $servers = @(
+        (Get-ApacheVersion),
+        (Get-NginxVersion)
+    )
+    if (Test-IsUbuntu20) {
+        $servers += (Get-Xsp4Version)
+    }
+
     $output = ""
     $output += New-MDHeader "Web Servers" -Level 3
-    $output += @(
-    (Get-ApacheVersion),
-    (Get-NginxVersion)
-    ) | Sort-Object Name | New-MDTable
-
+    $output += $servers | Sort-Object Name | New-MDTable
     $output += New-MDNewLine
+
     return $output
-}
+}