move example blacklist_helo list to docs/ with instructions to install

Jesse Norell

2016-02-08 8c8acac7bb7160e3833b9351bccb8d9c643bddf6

1
UPDATE `web_domain` SET `redirect_path` = CONCAT(`redirect_path`, '/') WHERE `redirect_path` != '' AND RIGHT(`redirect_path`, 1) != '/' AND (LEFT(`redirect_path`, 7) = 'http://' OR  LEFT(`redirect_path`, 8) = 'https://' OR LEFT(`redirect_path`, 11) = '[scheme]://');