comments.php improvements:
- no more double sql escaping on author & keyword (once in common.inc.php and
once in comments.php)
- now can search comment content on all special char ( ', ", <, >, & )
- author & keyword are correctly redisplayed in browser when they are MySql
escaped
git-svn-id: http://piwigo.org/svn/trunk@1716 68402e56-0260-453c-a942-63ccdbb3a9ee