merge the changes of remod r404 + r405

http://code.google.com/p/remod-sauerbraten/source/detail?r=404 ;
http://code.google.com/p/remod-sauerbraten/source/detail?r=405
merge the changes of remod r406 + r407

http://code.google.com/p/remod-sauerbraten/source/detail?r=406 (Add a
browser based authpanel) ;
http://code.google.com/p/remod-sauerbraten/source/detail?r=407
merge the changes of remod r408

http://code.google.com/p/remod-sauerbraten/source/detail?r=408
merge changes of remod r409

http://code.google.com/p/remod-sauerbraten/source/detail?r=409
merge the changes of remod r411

http://code.google.com/p/remod-sauerbraten/source/detail?r=411 ; the fix
of remod r410 was already merged with the last commit
merge the changes of remod r412

http://code.google.com/p/remod-sauerbraten/source/detail?r=412