fix(xfreerdp): try --list-kbd as last resort

This is the only option that seems to work in xfreerdp 1.0.2, which is
what comes with ubuntu 14.04.

Follow up to #1373

Author: yedayak

completions/xfreerdp

@@ -7,7 +7,10 @@ _comp_cmd_xfreerdp__kbd_list()
     kbd_list=$("$1" /list:kbd 2>/dev/null) ||
         # Old syntax, deprecated in 2022-10-19
         # See https://github.com/FreeRDP/FreeRDP/commit/119b8d4474ab8578101f86226e0d20a53460dd51
-        kbd_list=$("$1" /kbd-list 2>/dev/null)
+        kbd_list=$("$1" /kbd-list 2>/dev/null) ||
+        # This was removed in 2013, see https://github.com/FreeRDP/FreeRDP/commit/9295838f812b4b66bbe4df32f55a51ca8350d95d
+        # but it still exists in 1.0.2, which is the version in ubuntu 14.04.6
+        kbd_list=$("$1" --kbd-list 2>/dev/null)
     _comp_awk '/^0x/ { print $1 }' <<<"$kbd_list"
 }