Don't hardcode news model in Comment.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12026 e93f8b46-1217-0410-a6f0-8f06a7374b81
CVS root_url not recognized when connection string does not include port (#14422).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12027 e93f8b46-1217-0410-a6f0-8f06a7374b81
Merge branch 'master' of https://github.com/redmine/redmine

# By Jean-Philippe Lang
# Via Jean-Philippe Lang
* 'master' of https://github.com/redmine/redmine:
  CVS root_url not recognized when connection string does not include port (#14422).
  Don't hardcode news model in Comment.