#2310: Allow disabling comments from unauthenticated users

Some environments require that only authenticated users should be able to add comments.

Note that in general this should not be used and we should support an open open web without walled gardens, so this is turned off by default. But in some cases only allowing comments from insiders might be a valid requirement.

-- AntonioTerceiro - 08 Mar 2012

This should be enabled on a per-enviroment basis.

When an environment disables comments from unauthenticated users, specific profiles should be able to accept them, bypassing the environment settings.

-- AntonioTerceiro - 08 Mar 2012

This was implemented as a new plugin: RequireAuthToCommentPlugin

-- AntonioTerceiro - 09 Mar 2012