Add lua shebang recogn

ftyperc

@@ -735,6 +735,11 @@
  LUA
 *.lua
 -autoindent
+-syntax lua
+
+*
++#!\+\[     ]\+\[a-z/ ]lua\>
+-autoindent
 -syntax lua
 
  TCL
@@ -961,4 +966,4 @@
 -single_quoted
 -c_comment
 -text_delimiters #if|#ifdef|#ifndef=#elif=#else=#endif
--cpara >#!;*/%
+-cpara >#!;*/%