Add Client32 NCP support for FLAG and FLAGDIR

Implement a working DOS Client32 NCP87 path using the NIOS resolver,
CONNOpenByReference and COMPATNcpRequestReply.

Add an initial FLAGDIR implementation for NetWare 386-style directory
attributes.  Support Normal, System, Hidden, Delete Inhibit, Purge and
Rename Inhibit, using the same Client32 NCP87 modify/read helpers.  Match
the Novell FLAGDIR display style more closely for simple mapped paths.

Also add/keep minimal TESTS coverage for the verified Client32 NCP87
attribute path.

net.c

@@ -35,6 +35,7 @@ static struct s_net_functions {
 {"PATHINS","insert search path" ,                   func_path   , 2},
 {"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},
 {"SLIST",  "list servers",          		    func_slist  , 0},
 {"PASSWD", "change password",          		    func_passwd , 0},
 #if 1