fix subtree rename integrity; curiously enough, tes023 only failed on 64 bit arch; probably because we'd need to double the stack of the slab on 64 bit archs...

(ConfigReply) for the error messages.

_db_destroy functions.

LBER_ALIGNED_BUFFER(OPERATION_BUFFER_SIZE), as discussed in ITS#4078.
Add a corresponding SyncOperationBuffer in overlays/syncprov.c.

prevents delay of client, removes dependency on slap_replog knowledge

list because checking is performed on these, rather than the entry.

slap_mods_free() now takes an extra argument indicating whether to
free the values or not.

ACL checks when modifying user-modifiable attributes as non-root user.

remove syncrepl stuff from Operation struct