JIT: Better fixed prefix scan when UTF is enabled.

git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1437 2f5784b3-3f2a-0410-8824-cb99058d5e15
Fix caseless character class bug for characters within a range that have more 
than one other case.


git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1438 2f5784b3-3f2a-0410-8824-cb99058d5e15
Only test for pthreads when not under Windows.


git-svn-id: svn://vcs.exim.org/pcre/code/trunk@1439 2f5784b3-3f2a-0410-8824-cb99058d5e15