increase SRV answer timeout. Fixes #5466

src/common/resolver.py

@@ -284,7 +284,7 @@ def start_resolve(self, host, type):
 		"""
 		ns = NsLookup(self._on_ready, host, type)
 		ns.set_idlequeue(self.idlequeue)
-		ns.commandtimeout = 10
+		ns.commandtimeout = 20
 		ns.start()