Use 'm' ber_scanf format where convenient

servers/slapd/add.c

servers/slapd/ava.c

servers/slapd/back-bdb/passwd.c

servers/slapd/back-ldap/search.c

servers/slapd/back-ldbm/passwd.c

servers/slapd/back-meta/search.c

servers/slapd/bind.c

servers/slapd/compare.c

servers/slapd/delete.c

servers/slapd/filter.c

servers/slapd/modify.c

servers/slapd/modrdn.c

servers/slapd/mods.c

servers/slapd/mra.c

servers/slapd/passwd.c

servers/slapd/search.c