When on WSL2, check for internal host IP

Added line to check for the internal host IP before checking the
external IP addresses.

Also now parse the options before calling check_host, so that any passed
in options can be used in the check_host function.

runx

@@ -326,6 +326,7 @@ check_host() {                  # Check host environment
 
   # Get IP of Windows host
   [ "$Hostip" = "localhost" ] && Hostip="127.0.0.1"
+  [ "$Hostip" ] || [ "$Winsubsystem" = "WSL2" ] && Hostip="$(ip route list default | awk '{print $3}')"
   [ "$Hostip" ] || Hostip="$(ipconfig.exe | rmcr | grep 'IPv4' | grep -o '192\.168\.[0-9]*\.[0-9]*'       | head -n1 )"
   [ "$Hostip" ] || Hostip="$(ipconfig.exe | rmcr | grep 'IPv4' | grep -o '10\.0\.[0-9]*\.[0-9]*'          | head -n1 )"
   [ "$Hostip" ] || Hostip="$(ipconfig.exe | rmcr | grep 'IPv4' | grep -o '[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*' | head -n1 )"
@@ -777,8 +778,8 @@ export XAUTHORITY=$XAUTHORITY" > "$Xenvfile"
 
 trap finish EXIT
 declare_variables
-check_host
 parse_options "$@"
+check_host
 [ "$Cleanup" = "yes" ] && cleanup && Exitcode="${Exitcode:-0}"
 [ -z "$Exitcode" ]     && main
 finish "${Exitcode:-0}"