- Added empty function configure_fail2ban() to get rid of the following fatal...

- Added empty function configure_fail2ban() to get rid of the following fatal error during installation on non-Debian/Ubuntu systems: PHP Fatal error:  Call to undefined method installer::configure_fail2ban() in /tmp/trunk/install/install.php on line 266

install/lib/installer_base.lib.php

@@ -1256,6 +1256,10 @@ class installer_base {
 		*/
 	}
 	
+	public function configure_fail2ban() {
+        // To Do
+    }
+	
 	public function configure_squid()
 	{
 		global $conf;