Add new configuration parameter panel_window_name to set WM_NAME (and WM_ICON_NAME) to identify multiple instances of tint2. (Issue 460).

git-svn-id: http://tint2.googlecode.com/svn/trunk@690 121b4492-b84c-0410-8b4c-0d4edfb3f3cc

src/config.c

@@ -287,6 +287,10 @@ void add_entry (char *key, char *value)
 	else if (strcmp (key, "disable_transparency") == 0) {
 		server.disable_transparency = atoi (value);
 	}
+	else if (strcmp (key, "panel_window_name") == 0) {
+		if (strlen(value) > 0)
+			panel_window_name = strdup (value);
+	}
 
 	/* Battery */
 	else if (strcmp (key, "battery_low_status") == 0) {