-Don't interpolate the renderer when using stepmode since the physics aren't updated between steps and it creates visual jitter.

git-svn-id: http://odamex.net/svn/root/trunk@4070 b0bcef46-2027-0410-bd56-ab726e9a1d04
Always build and link against the version of miniupnpc in the repository.

git-svn-id: http://odamex.net/svn/root/trunk@4073 b0bcef46-2027-0410-bd56-ab726e9a1d04