Issue #2614504 by blackra, jibran, mohit_aghera, Yogesh Pawar, larowlan, lokapujya, Munavijayalakshmi, thpoul, andypost, xjm: Values of 'name' & 'email' fields should be NULL when comment has author (uid > 0)

Issue #2603818 by jhodgdon, beejeebus, blackra: Add defgroups for listing page headers for api.drupal.org

Issue #2606398 by blackra, chx, anil280988, sdstyles, xjm: Add EntityInterface::toUrl() and EntityInterface::toLink() and mark urlInfo(), url() and link() as deprecated

Issue #2599524 by blackra, krknth, jhodgdon, rhett.prichard: Fixing order of documentation sections for /core/lib/Drupal