bug 5165: check all sa-update channels for updates in --checkonly mode
bug 5165: check all sa-update channels for updates in --checkonly mode

git-svn-id: e9fe9b84e32fc5e57b7d09c40cd78b14ea28ed71@475353 13f79535-47bb-0310-9956-ffa450edef68

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