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Richard Mansfield authored
Adds a new page for Site admins to manage the list of sites for which iframes are allowed by htmlpurifier. Whenever an item is added, edited, or deleted, the regex used by HTMLPurifier is updated. Sites are identified by favicon, and by a string entered by the Admin to be used as the alt/title text for the favicon image. The source of the favicon image can be modified in config.php, but the google service is used by default. Change-Id: I4117de82691a002bf250ea71622eccfad4d5f8df Signed-off-by: Richard Mansfield <richard.mansfield@catalyst.net.nz>
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