- Update protocol documentation 

git-svn-id: http://odamex.net/svn/root/trunk@4429 b0bcef46-2027-0410-bd56-ab726e9a1d04
- Fix potential divide by zero

git-svn-id: http://odamex.net/svn/root/trunk@4430 b0bcef46-2027-0410-bd56-ab726e9a1d04