Menu code sucks, did you know?

Enter still goes to the platter.

Addons menu cleanup

See merge request STJr/SRB2Internal!316

ACZ3 intro

Closes #217

See merge request STJr/SRB2Internal!346

Deep Sea Zone 3 hardcoding

Closes #185

See merge request STJr/SRB2Internal!349

Automap fixes

See merge request STJr/SRB2Internal!348

Patch fixes (Resolves #230)

Closes #230

See merge request STJr/SRB2Internal!347

Several bug fixes!

Closes #210, #192, and #189

See merge request STJr/SRB2Internal!345

Resolve "Tails AI should die when taking damage in Ultimate"

Closes #231

See merge request STJr/SRB2Internal!344

Trigonometric input capping

See merge request STJr/SRB2Internal!343

Controller hotplug support.

See merge request STJr/SRB2Internal!342

* https://cdn.discordapp.com/attachments/428262628893261828/626792815451701259/srb20006.gif
* Add fadeout instead of slapstick for Fang Clone Fighter death.
* Allow placed Fang and Metal Sonic objects to be marked as Clone Fighters always through presence of MTF_EXTRA.

Correctly restrict MF_NOCLIPTHING-objects from being interacted with from both moving and non-moving side.

Remember when Lach recorded their live reaction to 2.2 so far? Do you recall what the reaction to ACZ3 was?

If you don't, the reaction was "WHAT?? Why is he here? This is GREAT but, what??" And while the reaction is on the positive end of things, it's stll clearly not advisable for our defining Big Reveal of the already huge update.

To this end: Here is a mini cutscene! https://cdn.discordapp.com/attachments/428262628893261828/626207624043429898/srb20005.gif
* He's digging through Eggman's trash.
* Clearly doesn't expect to see you!
* Ready for a fight all the same.
* You can attack him during the mini cutscene if you're impatient.
* Skipped if you give him MTF_AMBUSH.
* Requires new assets (including map) to test, but I'm not ready to make a MR yet because I have other thoughts first.

Also, since I was poking around in p_enemy.c, I fixed A_Boss1Laser's issues (not working with direct 2.1 port states and having the weird secondary attack).

Changed any instance of "joystick" in strings to "gamepad"
Renamed some cvars
Added a define for MAX_JOYSTICK
Added back the missing command line params.