Script and input tags if outputted by other extensions can
theoretically allow an XSS issue.
Just in case let's do this here.
Bug: T107206
Change-Id: I889f7827fb9084b7cf853a1843fdc48821237d65
Moved most of TextExtracts.php to the new extension.json
and added method for backward compatable implementation
of the extension if still called though the php file. Moved
unit test hook to Hooks.php and deleted old il8n.php.
Bug: T87979
Change-Id: I3d26bd931ad2941268b94474f3e6327282da24ec