Correct the operator in the comment so that it matches the actual #if
Added mouse support for the Atari.
Merge pull request #522 from oliverschmidt/master

Added mouse support for the Atari.
Add comments to the #else and #endifs to make it clearer to what #ifdef they belong.
Merge pull request #505 from adamdunkels/push/fix-the-fix-that-fixes-the-fix

Fix the bug in the IPv6 bugfix