Fixed bug #68129

Empty usernames and passwords are now treated differently from no username or password

For example, empty password:

    ftp://user:@example.org

Empty username:

    ftp://:password@example.org

Empty username and empty password

    ftp://:@example.org
Updated NEWS for #68129
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  Updated NEWS for #68129
  Fixed bug #68129
Updated NEWS for #68129