Regex update

[Jeff Bailey <jbailey@nisa.net>]

For -9, I want to include this patch:

2002-12-17 Isamu Hasegawa <isamu@yamato.ibm.com>

        * posix/regcomp.c (free_workarea_compile): Free the new member
        ORG_INDICES.
        (analyze): Initialize ORG_INDICES.
        (duplicate_node_closure): Search for a existing node, which is
        duplicated from the node ORG_DEST and satisfies the constraint
        CONSTRAINT.  And use it to avoid inifimite loop.
        (search_duplicated_node): New function.
        (duplicate_node): Store the index of the original node.
        * posix/regex_internal.c (re_dfa_add_node): Realloc ORG_INDICES
        if needed.
        * posix/regex_internal.h (re_dfa_t): Add new members.

Any objections?