sync with the man page slapadd(8) : does not change syncrepl entries in the ldif file when neither of the promotion (-p) or the demotion (-r) option is given.

allow no-user-modification propagations if back-ldap is used for replication (i.e. updatedn is defined)

Make sure sizelimit errors are propagated.

Also, took away abandon operations blank check against deferment.
Abandon must be deferred in some cases (such as when other operations
are pending) and should be deferred in some other cases (such as too
many threads).

ref are associated with the parent req instead of the original req, to
prevent infinite loops.

make file names more slapd-ish; add attribute inheritance to search attributes; precompile uppercased search

glueBack->be_entry_close before calling it