add IPv6 support

pymaster.py

@@ -67,6 +67,9 @@ class PyMaster:
 		self.serverRL = IPRateLimit('server', 60, 30)
 		self.clientRL = IPRateLimit('client', 60, 120)
 		self.ipfilterRL = IPRateLimit('filterlog', 60, 10)
+		if ':' in ip:
+			self.sock = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
+		else:
 			self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
 		self.sock.bind((ip, port))