linkchecker 5.x-2.2

* Removed confusing watchdog message.
* Use default node type revision setting and save a revision on 301 auto-update.
* UX: Provide more descriptive help what the HTML tags are for.
#451456: 301 auto-update could break links
#452080: Update permanently moved internal links is broken
* Removed duplicate _linkchecker_add_xxx_links() calls. node_save automaticallly calls hook_nodeapi and comment_save automatically calls hook_comment with 'update'.
* Added a link to the job_queue module project page
#465414: Stop incorrect extraction of relative links
* Typo fixed in batch finished message
* Removed unused default case
* Removed UI setting no longer having a real use case (and reduce complexity)
* Deleted the associated variable.
* One more chance to extract a URL (for e.g. Java Applet)
* Added support for HTML5 tags (video|audio|source)
* Uncomment cURL requirement until implemented.
#402742: Integration with path_redirect
#427906, #417354: Extract links from various configurable HTML tags (a|area|img|iframe|object|param|embed)
#504332: Cannot install, HTTP request status fails
* Show edit link only if user have permission to change settings
* New permission to edit link settings
* Add UI to change request method
* Add ignore filter for links pointing to buggy servers
#425722 by hass: Permanently moved links not updated, retry on redirected link was missing
#419572 by jromine, hass: mailto:, javascript: links reported as broken