[pcre-dev] Add ability to return last MARK with failed match

Hi, Philip!

Perl regexp documentation says:

When a match has failed, and unless another verb has been involved in
failing the match and has provided its own name to use, the $REGERROR
variable will be set to the name of the most recently executed
(*MARK:NAME).


How you think about adding this ability to PCRE. May be the last MARK
value may be returned by the same variable that in match case.

Thanx.