Issue #1930430 by benjifisher: Fixed Migration integration misses title attribute for mutiple-valued link fields.

Issue #97766 by tanepiper, heddn, timbrandin, droath, alanburke, Digidog: Class attribute field option for each dataset in link widget.

Issue #1266474 by redndahead, franz, RobLoach, jcfiala, markabur: Use field label as the label for the title field

Issue #2036645 by lex0r: restricting the explode to 2 items when breaking apart querystrings helps prevent problems with unescaped = characters in the data.

Issue #1928116 by jcfiala: Added field variable to variables for link formatter functions in hook_theme.

#2043001 by zhuber:Add xxx to list of top level domains.--author=zhuber <zhuber@1437276.no-reply.drupal.org>

Issue #2036115 by Samvel:Validation of link field was not being properly passed through to hook_field_widget_error().

Issue #2036115 by Samvel:Validation of link field was not being properly passed through to hook_field_widget_error().

Issue #1918850 by jsacksick: Prevents undefined variable messages in link_i18n_string_list_field_alter().

Issue #1179944 by jcfiala,mr.york: Added variable_get calls so that the list of TLD that pass validation can be set by admins.

Issue #1715246 by Haza, jcfiala: Fixed strict warning when loading entity for token use, also fixed problem with the title attribute not being handeld properly.

Issue #1309768 by jcfiala: Made URL label of url-only link fields invisible instead of removing it, to be 508 compliant.

Issue # by jcfiala: Fixed how possible tokens are displayed when setting up a link field - had been using a variable which was not defined in that scope.