Use a .NET API call instead of a Win8+ cmdlet

The root cause is that Windows 7 doesn't have Get-NetIPAddress (
see:
https://stackoverflow.com/questions/19529442/gather-ip-address-information
)
but the change was to try and solve the bug that the VPN IP
addresses
aren't visible detailed
here:
https://support.microsoft.com/en-us/kb/2549091

Resolved using the
2nd solution
from
http://serverfault.com/questions/145259/powershell-win32-networkadapterconfiguration-not-seeing-ppp-adapter

plugins/synced_folders/smb/scripts/host_info.ps1

@@ -1,11 +1,21 @@
-$ErrorAction = "Stop"
-
-$net = Get-NetIPAddress | Where-Object {
-    ($_.IPAddress -ne "127.0.0.1") -and ($_.IPAddress -ne "::1")
-} | Sort-Object $_.AddressFamily
-
-$result = @{
-	ip_addresses = $net.IPAddress
-}
-
-Write-Output $(ConvertTo-Json $result)
+$ErrorAction = "Stop"
+
+# Find all of the NICsq
+$nics = [System.Net.NetworkInformation.NetworkInterface]::GetAllNetworkInterfaces()
+
+# Save the IP addresses somewhere
+$nic_ip_addresses = @()
+
+foreach ($nic in $nics) {
+    $nic_ip_addresses += $nic.GetIPProperties().UnicastAddresses | Where-Object {
+      ($_.Address.IPAddressToString -ne "127.0.0.1") -and ($_.Address.IPAddressToString -ne "::1")
+    } | Select -ExpandProperty Address
+}
+
+$nic_ip_addresses = $nic_ip_addresses | Sort-Object $_.AddressFamily
+
+$result = @{
+	ip_addresses = $nic_ip_addresses.IPAddressToString
+}
+
+Write-Output $(ConvertTo-Json $result)