(synced syncprov.c with HEAD)

Segfault fix for ldapadding new schema entries

Various documentation updates
bconfig segfault w/ ldapadd on schema fix noted.

fix "require" inheritance and handling of "none" (ITS#4574)
Add access control note to authz-regexp discussion
ITS#4613 note that lastmod also controls entryCSN and entryUUID

Also: acl_match_set(): Initialize bvals before backend_attribute(,,,,&bvals,);

more ITS#4622 fixes: syncprov: delete contextCSN on checkpoint if ctxcsn is empty

+       Patch to fix ITS4572
+       Patch to fix ITS4575
+       Patch to fix ITS4576
+       Patch to fix ITS4580
+       Patch to fix ITS4582
+       Patch to fix ITS4583
+       Patch to fix ITS4589
+       Patch to fix ITS4595
+       Patch to fix ITS4616
+       Patch to fix ITS4534/ITS4622
+       Fixes auditlog DB initialization
+       Fix for back-bdb and back-hdb cache job
+       liblber fix
+       Password length bug fix
+       Fixes return code bug
CHANGES needs work