Rough in extended ops, modify, and modrdn.

servers/slapd/back-bdb/add.c

servers/slapd/back-bdb/back-bdb.h

servers/slapd/back-bdb/backbdb.dsp

servers/slapd/back-bdb/bind.c

servers/slapd/back-bdb/compare.c

servers/slapd/back-bdb/config.c

servers/slapd/back-bdb/delete.c

servers/slapd/back-bdb/dn2entry.c

servers/slapd/back-bdb/dn2id.c

servers/slapd/back-bdb/extended.c

servers/slapd/back-bdb/external.h

servers/slapd/back-bdb/id2entry.c

servers/slapd/back-bdb/idl.c

servers/slapd/back-bdb/init.c

servers/slapd/back-bdb/modify.c

servers/slapd/back-bdb/modrdn.c

servers/slapd/back-bdb/passwd.c

servers/slapd/back-bdb/proto-bdb.h

servers/slapd/back-bdb/referral.c

servers/slapd/back-bdb/search.c