Update NEWS

Author: mhaas

NEWS

@@ -12,6 +12,8 @@ WiFiDog 1.2.1:
 	* Enhance safe_malloc to always zero memory (#155)
 	* Fix segfault related pstr_t's buffer (#149)
 	* Add open the firewall if no auth servers can be reached (optional, #90)
+	* Add configurable ARP table location (-a switch). Useful for mock ARP tables during
+		load tests (#166)
 	* Various other fixes and minor improvements, see
 		https://github.com/wifidog/wifidog-gateway/compare/1.2.0...1.2.1