luaL_reg was already deprecated in Lua 5.1.4.

It is gone in Lua 5.2.0 and was replaced by luaL_Reg
which already existed in 5.1.4. So use that one..


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1239029 13f79535-47bb-0310-9956-ffa450edef68