link 6.x-2.6

Re-branched the project to DRUPAL-6--2 to match convention.
support request #384278: Update warning (link module can not be updated) by jcfiala: Added noop link_update_1() to allow people with really old sites to update without schema errors.
bug report #384278: Update warning (link module can not be updated) by Rob Loach,BWPanda Removed uneeded hook_update_last_removed() call.
#370195: "inactive Link field" after upgrade by grendzy. Ensure content.module runs its update first.
bug report #318277: Null value error when creating a new node with an empty link URL by quicksketch, recidive: set fields created by drupal 5 to nullable.
task #438756: Link module does not pass Coder Drupal Standards Test by jcfiala: Bring link module to Drupal standards.
Changing widget name to just "Link".
#328607: Plain Formatter omits query strings, named anchors. Plain formatter omits query strings and named anchors when printing URLs.
#278180: Link Target: "Allow the user to choose" option not displayed on node editing form: ll user to choose link target
bug report #436020: Link module treats .asia as an invalid domain name by David_Rothstein: Allows .asia as valid domain.
bug report #436020: Link module treats .asia as an invalid domain name by joshuajabbour: Allow exclamation mark in URL, as per RFC 1738.

Basically, this is the same as LINK-6--2-BETA3.