gravatar 6.x-1.8

Changes since DRUPAL-6--1-7:

• by Dave Reid: Split the account re-loading code into a separate _gravatar_load_account() function.
• by Dave Reid: Moved module settings from admin/user/gravatar to admin/settings/gravatar for consistency with other configuration paths.
• by Dave Reid: Updated README.txt.
• by Dave Reid: Fixed coder warnings.
• #502954 by Dave Reid: Added rel='external nofollow' to anonymous users' website links in comments.
• by Dave Reid: Cleaned up the account handling.
• #514928 by Dave Reid: Use hostname if an anonymous comment does not have an e-mail address.
• by Dave Reid: Make the _gravatar_get_gravatar() a better API function.
• by Dave Reid: Removed old function gravatar_email_validate().
• by Dave Reid: Code cleanups and optimizations.
• by Dave Reid: Split the user picture logic into _gravatar_get_account_user_picture() from gravatar_preprocess_user_picture().
• by Dave Reid: Reverted the menu path change from admin/user/gravatar to admin/settings/gravatar. That was silly of me and the path in D7 will be admin/config/people/gravatar.
• by Dave Reid: Cleaned up admin settings code.
• by Dave Reid: Fixed last commit and cleaned up default image descriptions.
• by Dave Reid: Fixed loss of name for anonymous commenters.
• #606626 by Dave Reid: Added SSL support.
• by Dave Reid: Updated links in README.txt.
• by Dave Reid: Use a constant for the maximum gravatar size.
• by Dave Reid: Added support for a 404 default image response.