&$attribs: the attributes to be applied.
$linkType: The external link type
+'LinkerMakeMediaLinkFile': At the end of Linker::makeMediaLinkFile() just
+before the return.
+$title: the Title object that the link is pointing to
+$file: the File object or false if broken link
+&$html: the link text
+&$attribs: the attributes to be applied
+&$ret: the value to return if your hook returns false
+
'LinksUpdate': At the beginning of LinksUpdate::doUpdate() just before the
actual update.
&$linksUpdate: the LinksUpdate object