Plink and PSCP were failing to load the `Default Settings' options

when connecting to an arbitrary hostname. In particular, setting a
default user name didn't work. Now it does.

[originally from svn r747]

plink.c

@@ -370,13 +370,15 @@ int main(int argc, char **argv) {
                         /*
                          * One string.
                          */
-                        do_defaults (p, &cfg);
-                        if (cfg.host[0] == '\0') {
+                        Config cfg2;
+                        do_defaults (p, &cfg2);
+                        if (cfg2.host[0] == '\0') {
                             /* No settings for this host; use defaults */
                             strncpy(cfg.host, p, sizeof(cfg.host)-1);
                             cfg.host[sizeof(cfg.host)-1] = '\0';
                             cfg.port = 22;
-                        }
+                        } else
+                            cfg = cfg2;
                     } else {
                         *r++ = '\0';
                         strncpy(cfg.username, p, sizeof(cfg.username)-1);

scp.c

@@ -444,6 +444,7 @@ static void do_cmd(char *host, char *user, char *cmd)
     do_defaults(host, &cfg);
     if (cfg.host[0] == '\0') {
 	/* No settings for this host; use defaults */
+        do_defaults(NULL, &cfg);
 	strncpy(cfg.host, host, sizeof(cfg.host)-1);
 	cfg.host[sizeof(cfg.host)-1] = '\0';
 	cfg.port = 22;