Fix for `psftp-pscp-ignore-load': Default Settings is now loaded

before "-load" is processed so that it doesn't clobber it.

I've also changed the semantics of "-load" slightly for PSCP, PSFTP,
and Plink: if it's specified at all, it overrides (disables) the
implicit loading of session details based on a supplied hostname
elsewhere (on the grounds that the user is more likely to want the
"-load" session than the implicit session). (PuTTY itself doesn't do
implicit loading at all, so I haven't changed it.)

This means that all the PuTTY tools' behaviour is now consistent iff
"-load" is specified (otherwise, some tools have implicit-session, and
others don't).

However, I've not documented this behaviour, as there's a good chance
it will be swept away if and when we get round to sorting out how we
deal with settings from multiple sources. It's intended as a "do
something sensible" change.

[originally from svn r4352]

cmdline.c

@@ -137,6 +137,7 @@ int cmdline_process_param(char *p, char *value, int need_save, Config *cfg)
 	/* This parameter must be processed immediately rather than being
 	 * saved. */
 	do_defaults(value, cfg);
+	loaded_session = TRUE;
 	return 2;
     }
     if (!strcmp(p, "-ssh")) {