QPID-5599: C++ Broker silently ignores --max-connections option when no ACL file is loaded

Subsequent reloads of the ACL file did not reflect that the rule set in force
was created by a user.



git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1574490 13f79535-47bb-0310-9956-ffa450edef68