dosutils: implement GRANT trustee management

- add GRANT as a new multi-call DOS utility
- implement Client32 NCP87 trustee-add helper
- resolve USER and GROUP bindery objects before granting rights
- support Novell-style rights lists, including ALL and N
- support directory trustee grants
- support file trustee grants via /FILES
- implement recursive grants via /SUBDIRECTORIES
- accept /SUBDIRS as a compatibility alias
- format GRANT success output close to Novell GRANT
- add GRANT comparison scripts for normal and recursive test cases

net.c

@@ -36,6 +36,7 @@ static struct s_net_functions {
 {"LOGOUT", "logout from server",       		    func_logout , 0},
 {"FLAG",   "display or modify file attributes",     func_flag   , 0},
 {"FLAGDIR","display or modify directory attributes",func_flagdir, 0},
+{"GRANT",  "grant trustee rights",                  func_grant  , 0},
 {"RIGHTS", "display effective file/directory rights",func_rights, 0},
 {"SLIST",  "list servers",          		    func_slist  , 0},
 {"PASSWD", "change password",          		    func_passwd , 0},