Allow quantifiers on (?!) so as to be the same as other assertions.


git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1393 2f5784b3-3f2a-0410-8824-cb99058d5e15
Require group names to start with a non-digit.


git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1394 2f5784b3-3f2a-0410-8824-cb99058d5e15