added POD documentation and --clean switch to tools/check_whitelist, allowing AWL to be cleaned of single-hit old entries.   fixes bug 1883: record number of emails received in AWL; bug 2103: AWL needs a way to be cleaned out
added POD documentation and --clean switch to tools/check_whitelist, allowing AWL to be cleaned of single-hit old entries.   fixes bug 1883: record number of emails received in AWL; bug 2103: AWL needs a way to be cleaned out

git-svn-id: d99324e817494df82bb0080d8e7ab74680731a10@6569 13f79535-47bb-0310-9956-ffa450edef68

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