Modified slapd to be slurpd friendly.

Modified slapd to be slurpd friendly.
	Slurpd incorrectly sends a separate attribute for each value of an
	attribute which caused slapd to complain.  Hacked slapd/add.c
	to merge values.
	Slurpd uses version 2 and hence cannot set ManageDSAit.  Hack
	slapd/back-ldbm/referral.c such that if update_ndn matches
	o_ndn, no referrals are returned.
Fix replication tests
	ldapmodify must be made against master as no rebind proc exists
	final ldapsearch should not chase
Fix referral tests
	Use -C option as needed