unifdef -DSLAP_ACL_HONOR_MANAGE
unifdef -DSLAP_OVERLAY_ACCESS
unifdef -DSLAP_ORDERED_PRETTYNORM
unifdef -DSLAP_AUTHZ_SYNTAX
Move LDAP_COLLECTIVE_ATTRIBUTES, LDAP_COMP_MATCH, and LDAP_SYNC_TIMESTAMP
back behind LDAP_DEVEL (as these either too experimental or not yet
implemented).

handle compare in frontend if backend couldn't handle it (and returned SLAP_CB_CONTINUE; e.g. if wrapped around an overlay...)

move compare to frontend (disabled by default, only invoked if backend doesn't provide hook); honor ITS#3472 (disclose access check); fix ITS#3521 as well (check access to hasSubordinates); fix a problem in backend_attribute() with operational attrs; add backend_access() helper

global overlays need to set o_bd = frontendDB to return the error in case no database can be selected

filterentry cleanup

Need to implement filter support (for entryDN and subschemaSubentry).
Fixed hasSubordinate assert() bug in entry filters

frontend stuff moved into a database structure, essentially to allow overlays to be processed before database selection; passes all tests (ITS#3080)