Use ArgumentCompletions instead of ValidateSet

- Allows for user input not restricted by the given choices.
  This is especially useful for non-standard interface names
- Applies to PSX.psm1 and h/Get-InterfaceAddress.ps1

PSX.psm1

@@ -94,7 +94,7 @@ function Convert-Shell
     [String]$Type = "conpty",
 
     [Parameter(Mandatory = $false)]
-    [ValidateSet("tun0", "eth0", "wlan0", "lo")]
+    [ArgumentCompletions("tun0", "eth0", "wlan0", "lo")]
     [Alias("i")]
     [String]$Interface = "tun0",
 
@@ -127,7 +127,7 @@ function Convert-Shell
     [String]$Srvport = "80",
 
 		[Parameter(Mandatory = $false)]
-    [ValidateSet("powershell", "cmd")]
+    [ArgumentCompletions("powershell", "cmd")]
     [Alias("e")]
     [String]$Exec = "powershell",
 

helpers/Get-InterfaceAddress.ps1

@@ -23,7 +23,7 @@ function Get-InterfaceAddress {
     param (
 
       [Parameter(Mandatory = $true)]
-      [ValidateSet("eth0", "wlan0", "tun0", "lo")]
+      [ArgumentCompletions("eth0", "wlan0", "tun0", "lo")]
       [Alias("i")]
       [String]$Interface = "tun0"