DOC: Revert dnsToIp error change, seperate log message for socket.error

fail2ban/server/filter.py

@@ -664,10 +664,14 @@ class DNSUtils:
 		"""
 		try:
 			return socket.gethostbyname_ex(dns)[2]
-		except socket.error:
+		except socket.gaierror:
 			logSys.warn("Unable to find a corresponding IP address for %s"
 						% dns)
 			return list()
+		except socket.error, e:
+			logSys.warn("Socket error raised trying to resolve hostname %s: %s"
+						% (dns, e))
+			return list()
 	dnsToIp = staticmethod(dnsToIp)
 
 	#@staticmethod