Sync with HEAD

CHANGES

doc/man/man5/slapd-meta.5

libraries/libldap/cyrus.c

libraries/libldap/tls.c

libraries/libldap/unbind.c

libraries/liblutil/csn.c

servers/slapd/back-meta/back-meta.h

servers/slapd/back-meta/bind.c

servers/slapd/back-meta/conn.c

servers/slapd/back-meta/init.c

servers/slapd/back-sql/schema-map.c

servers/slapd/backend.c

servers/slapd/backover.c

servers/slapd/overlays/accesslog.c

servers/slapd/overlays/syncprov.c

servers/slapd/overlays/unique.c

servers/slapd/passwd.c

servers/slapd/slap.h

servers/slapd/syncrepl.c