Use PERL_SYS_INIT() instead of broken PERL_SYS_INIT3(,,NULL).  Pass its
output variables to perl_parse().  Fix argument type 'char *(*argv)[3]'
to 'char ***argv'.  NULL-terminate argv in case that is needed.

slap_send_search_entry(), slap_send_search_reference(): Never skip
the cleanup code.  Sending an entry did on sizeLimitExceeded/busy.
Sending a ref dropped rs_flush_entry() on error.

Seems simpler this way. No need for a back-config specific
bi_access_allowed() handler.

more for ITS#7066

Dynamically adding ACL for cn=config didn't work correctly, when no
ACLs where present for that database upon startup. Delete the last
ACL from the DB could also lead to unexpected results.

2-byte alignment isn't good enough for subpages

So they can be reused, and avoid unnecessary page_searches

Bug was caused by postalAddressNormalize sending 0-length values
to UTF8StringNormalize.

Detected by valgrind

Well, just like in back-bdb in 2005, it only slowed things down
on larger LDIFs.

Sub-pages need room to grow...

NULL out env->pghead before writing it, so that its pages can't be used
to satisfy the write.

Only for DUPFIXED DBs. Still could do better.

Missed a MDB_RESERVE case

When putting a record, just make space for the data, don't copy it.
(Not compatible with MDB_DUPSORT, since the actual data is needed
to determine the insert location.)

Skip the original cursor that made the change