feature: added the optional 5th argument to ngx.re.match() which is the user-supplied result table for the captures.
feature: added the optional 5th argument to ngx.re.match() which is the user-supplied result table for the captures.

This feature gives 12%+ speedup for simple ngx.re.match() calls with 4
submatch captures.

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