Update to 8.34:

Release 8.34 15-December-2013
-----------------------------

As well as fixing the inevitable bugs, performance has been improved by
refactoring and extending the amount of "auto-possessification" that PCRE does.
Other notable changes:

.  Implemented PCRE_INFO_MATCH_EMPTY, which yields 1 if the pattern can match
   an empty string. If it can, pcretest shows this in its information output.

.  A back reference to a named subpattern when there is more than one of the
   same name now checks them in the order in which they appear in the pattern.
   The first one that is set is used for the reference. Previously only the
   first one was inspected. This change makes PCRE more compatible with Perl.

.  Unicode character properties were updated from Unicode 6.3.0.

.  The character VT has been added to the set of characters that match \s and
   are generally treated as white space, following this same change in Perl
   5.18. There is now no difference between "Perl space" and "POSIX space".

.  Perl has changed its handling of \8 and \9. If there is no previously
   encountered capturing group of those numbers, they are treated as the
   literal characters 8 and 9 instead of a binary zero followed by the
   literals. PCRE now does the same.

.  Following Perl, added \o{} to specify codepoints in octal, making it
   possible to specify values greater than 0777 and also making them
   unambiguous.

.  In UCP mode, \s was not matching two of the characters that Perl matches,
   namely NEL (U+0085) and MONGOLIAN VOWEL SEPARATOR (U+180E), though they
   were matched by \h.

.  Add JIT support for the 64 bit TileGX architecture.

.  Upgraded the handling of the POSIX classes [:graph:], [:print:], and
   [:punct:] when PCRE_UCP is set so as to include the same characters as Perl
   does in Unicode mode.

.  Perl no longer allows group names to start with digits, so I have made this
   change also in PCRE.

.  Added support for [[:<:]] and [[:>:]] as used in the BSD POSIX library to
   mean "start of word" and "end of word", respectively, as a transition aid.


(wiz)