Fix bug introduced by fe3d08fb79

Fix bug introduced by fe3d08fb79

One example bug introduced is team-based gamemodes being no longer team-based, and some scoreboard funkiness found by @terencehill.
Gametypes also use mutators, seems that this commit (specifically changing .m_name -> .mutatorname) didn't properly account for that somehow.
I couldn't find the .m_name access that needed to be changed, so instead I reverted that change and added .message to Mutator.
In future for consistency's sake .m_name should be renamed to .mutatorname in Mutator, and .message to .m_name in Gametype and Mutator.