- lib/unix_sec_ctxt.c

- lib/unix_sec_ctxt.c

	attempt at taking lib/uid.c and getting a unix security context
	change module that is independent of "cnums" and "snums".
	a security context is needed for pipes, not just IPC$ or other
	services.

- group database API

	added add_group/alias_member, del_group/alias_member,
	del_group/alias_entry functions.  del_builtin_entry() is
	deliberately set to NULL to cause an exception, you cannot
	delete builtin aliases.

- parse_lsa.c srv_lsa.c

	fixed lookup_names code, it was a load of trash and didn't do
	anything.

- cmd_samr.c rpcclient.c srv_samr.c

	added "deletegroup", "deletealias", "delaliasmem", "delgroupmem",
	"addgroupmem", "addaliasmem", "createalias", "creategroup", to
	both client and server code.

	server code calls into unix stubs right now, which don't actually
	do anything.  the only instance where they are expected to do
	anything is in appliance mode NOT even in the ldap code or anything.

	client code modified to call samr_lookup_names() for group code
	(because we can) and lsa_lookup_names() for alias code (because
	we have to).

- srv_lookup.c

	oops, lookup on unsplit name, we got lookup on DOMAIN, DOMAIN\name
	instead of DOMAIN, name.