More items for RE24

[Hallvard B Furuseth <h.b.furuseth@usit.uio.no>]

ITS#6760 is in RE24, though I never marked it Test.  Did someone review
it as requested in the ITS?

Wishes:

ITS#6739 broken do_syncrep2().
Partial fix which can stand alone, so this no longer breaks:
	CPPFLAGS=-DLDAP_THREAD_DEBUG ./configure
	./run -b ldif test019
crashed because a thread unlocked another thread's mutex.

ITS#6792 (rwm suppressed LDAP response message).
ITS#6793 (bad free in back-ldap on matchedDN change).



Could add ITS#6727 to the ITS#6632 line in CHANGES, it's a dup.  I've
marked Release.

-- 
Hallvard