(main): try to use $USERNAME

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6261 ec53bebd-3082-4978-b11e-865c3cabbd6b

appl/kx/kx.c

@@ -718,6 +718,8 @@ main(int argc, char **argv)
 	}
     }
 
+    if (user == NULL) {
+	user = getenv ("USERNAME");
 	if (user == NULL) {
 	    struct passwd *pwd = getpwuid (getuid ());
 
@@ -725,6 +727,7 @@ main(int argc, char **argv)
 		errx (1, "who are you?");
 	    user = pwd->pw_name;
 	}
+    }
 
     if (!passive_flag)
 	passive_flag = check_for_passive (getenv("DISPLAY"));