- Added new confic option: JOIN_WITH_MUTANT_HUMANS

- Uncommented all stuff that was commented in the last commit.
- Added a check in front of it that blocks them from showing up in the setup window if JOIN_WITH_MUTANT_HUMANS is not set.
- Included new game_options.txt as an example.

The tgstation server has never used the example game_options.txt so the new config option will not be enabled on it. Even if it did, the option starts commented out in the file.

game_options.txt

@@ -249,9 +249,12 @@ DEFAULT_LAWS 1
 ## Attempting to upload laws past this point will fail unless the AI is reset
 SILICON_MAX_LAW_AMOUNT 12
 
-## Uncoment to give players the choice of their species before they join the game
+## Uncomment to give players the choice of their species before they join the game
 #JOIN_WITH_MUTANT_RACE
 
+## Uncomment to give players the choice of joining as a human with mutant bodyparts before they join the game
+#JOIN_WITH_MUTANT_HUMANS
+
 ## Assistant slot cap. Set to -1 for unlimited.
 ASSISTANT_CAP -1