tweak STYLE_GIBBERISH and CANT_SEE_AD

git-svn-id: https://svn.apache.org/repos/asf/spamassassin/trunk@1582520 13f79535-47bb-0310-9956-ffa450edef68
tweak LONG_HEX_URI, HTML_OFF_PAGE

git-svn-id: https://svn.apache.org/repos/asf/spamassassin/trunk@1582541 13f79535-47bb-0310-9956-ffa450edef68