[453293] Don't quit loop_forever() if broker not available.

This is a workaround for bug #453293, a better solution is needed for
1.5.

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=453293

ChangeLog.txt

@@ -86,6 +86,8 @@ Client library:
 - Wildcard TLS certificates are now supported.
 - mosquittopp now has a virtual destructor. Closes bug #452915.
 - Add support for MQTT v3.1.1.
+- Don't quit mosquitto_loop_forever() if broker not available on first
+  connect. Closes bug #453293, but requires more work.
 
 
 1.3.5 - 20141008

lib/mosquitto.c

@@ -999,10 +999,11 @@ int mosquitto_loop_forever(struct mosquitto *mosq, int timeout, int max_packets)
 			case MOSQ_ERR_AUTH:
 			case MOSQ_ERR_ACL_DENIED:
 			case MOSQ_ERR_UNKNOWN:
-			case MOSQ_ERR_ERRNO:
 			case MOSQ_ERR_EAI:
 			case MOSQ_ERR_PROXY:
 				return rc;
+			case MOSQ_ERR_ERRNO:
+				break;
 		}
 		if(errno == EPROTO){
 			return rc;