optimize: made ngx.re.match and ngx.re.gmatch faster for LuaJIT 2.x when there is no submatch captures.
optimize: made ngx.re.match and ngx.re.gmatch faster for LuaJIT 2.x when there is no submatch captures.

yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx