(bug 23002) Imagelinks table not updated after imagemove. The actual bug was inconsis...

(bug 23002) Imagelinks table not updated after imagemove. The actual bug was inconsistent behaviour between imagelinks and pagelinks for redirects.
* Parser now only adds the redirect source to imagelinks, like it does in pagelinks
* ImagePage now shows the file redirects in-line with the normal "The following pages link to this file:"
** Added message linkstoimage-redirect
** Removed the separate file redirects section and removed associated message redirectstofile
** ImagePage::imageLinks will first fetch image links to the file, determine which are redirects, and if there are fewer links than the limit, fetch the redirect target links.