Added Will Ballantyne's General Aliasing code.

include/ldapconfig.h.edit

servers/slapd/Make-template

servers/slapd/back-ldbm/Make-template

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

servers/slapd/back-ldbm/search.c

servers/slapd/backend.c

servers/slapd/bind.c

servers/slapd/config.c

servers/slapd/delete.c

servers/slapd/modify.c

servers/slapd/proto-slap.h

servers/slapd/search.c

servers/slapd/slap.h