security patch, add some functions description

git-svn-id: https://plugins.svn.wordpress.org/yast-yet-another-support-tool/trunk@1038756 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme

git-svn-id: https://plugins.svn.wordpress.org/yast-yet-another-support-tool/trunk@1038757 b8457f37-d9ea-0310-8a92-e5e31aec5664
forgotten file in previous commit

git-svn-id: https://plugins.svn.wordpress.org/yast-yet-another-support-tool/trunk@1038761 b8457f37-d9ea-0310-8a92-e5e31aec5664