[jboss-jira] [JBoss JIRA] (JGRP-2254) Add default for dns_address in DNS_PING

Add default for dns_address in DNS_PING --------------------------------------- Key: JGRP-2254 URL: https://issues.jboss.org/browse/JGRP-2254 Project: JGroups Issue Type: Enhancement Reporter: Sebastian Łaskawiec Assignee: Sebastian Łaskawiec Fix For: 4.0.12 Currently we require our user to fill in {{dns_address}} for {{DNS_PING}}. It can be obtained by scanning {{/etc/resolv.conf}} but in case users don't supply anything, we should use some sensible default. Implementation examples: * https://github.com/netty/netty/commit/61eea4e107357e3420d37b935856ff7290b...