Changed comment.   (The note about sub-domains was a red herring).

git-svn-id: http://svn.code.sf.net/p/mrbs/code/mrbs/trunk@2864 25f7e783-145e-4f2d-a9f8-dd7182bfe9c7
Added some session error checking

git-svn-id: http://svn.code.sf.net/p/mrbs/code/mrbs/trunk@2865 25f7e783-145e-4f2d-a9f8-dd7182bfe9c7