pcre: Integrate pending patches for next upstream version 8.39

pcre: Integrate pending patches for next upstream version 8.39

 - Fix auto-callout
    (http://vcs.pcre.org/viewvc?view=rev&revision=1611)
 -  Fix negated POSIX class within negated overall class UCP
    (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1612 2f5784b3-3f2a-0410-8824-cb99058d5e15)
 - Fix bug for isolated \E between an item and its qualifier when auto callout is set.
    (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1613 2f5784b3-3f2a-0410-8824-cb99058d5e15)
 - Give error for regexec with pmatch=NULL and REG_STARTEND set
    (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1614 2f5784b3-3f2a-0410-8824-cb99058d5e15)
 - Fix \Q\E before qualifier bug when auto callouts are
   (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1616 2f5784b3-3f2a-0410-8824-cb99058d5e15)
 - Fix /x bug when pattern starts with white space and (?-x)
   (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1617 2f5784b3-3f2a-0410-8824-cb99058d5e15)
 - Fix copy named substring bug.
   (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1618 2f5784b3-3f2a-0410-8824-cb99058d5e15)
 - Fix (by hacking) another length computation issue.
   (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1619 2f5784b3-3f2a-0410-8824-cb99058d5e15

 - Fix get_substring_list() bug when \K is used in an assertion.
   (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1620 2f5784b3-3f2a-0410-8824-cb99058d5e15

 - Fix pcretest bad behaviour for callout in lookbehind.
   (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1625 2f5784b3-3f2a-0410-8824-cb99058d5e15

 - Fix workspace overflow for (*ACCEPT) with deeply nested
   (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1631 2f5784b3-3f2a-0410-8824-cb99058d5e15
   fixes CVE-2016-3191

 - Fix Yet another duplicate name bugfix by overestimating the memory needed (i.e. another hack - PCRE2 has this "properly" fixed).
   (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1636 2f5784b3-3f2a-0410-8824-cb99058d5e15

 - Fix pcretest loop for global matching with an ovector size
   (git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1637 2f5784b3-3f2a-0410-8824-cb99058d5e15

Signed-off-by: heil <heil@terminal-consulting.de>