Changed suffix_alias() to use struct berval * in-place.

servers/slapd/bind.c

servers/slapd/compare.c

servers/slapd/delete.c

servers/slapd/modify.c

servers/slapd/modrdn.c

servers/slapd/proto-slap.h

servers/slapd/repl.c

servers/slapd/saslauthz.c

servers/slapd/search.c

servers/slapd/suffixalias.c