Host Controller Automatically Reconnects to Domain Controller When Using --cached-dc Option

I think a bit clearer is "... it automatically reconnects to the domain controller, in case the domain controller was not reachable or down when the host controller started

See https://issues.jboss.org/browse/JBEAP-8941?focusedCommentId=13382507&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13382507