t.rules rule test suite: support additional configuration files, named 't.rules/RULE_NAME/msg.cf', which will be read before the message of that name is scanned
t.rules rule test suite: support additional configuration files, named 't.rules/RULE_NAME/msg.cf', which will be read before the message of that name is scanned

git-svn-id: e9fe9b84e32fc5e57b7d09c40cd78b14ea28ed71@685929 13f79535-47bb-0310-9956-ffa450edef68

apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin,apache/spamassassin