This reverts commit 09d9a555.

also, SplitPoly returns if ps < 0, so there's no need to check for ps >= 0 afterwards

Apply srb2home path to EXEC, SAVECONFIG, and debugfile

See merge request !379

Fix savegamename being improperly built

See merge request !378

Remove windows installer

See merge request STJr/SRB2!372

Update code versions to 2.1.21

See merge request STJr/SRB2!338

Block previous versions' config defaults with EXECVERSION consvar

See merge request STJr/SRB2!371

* Change alwaysfreelook2 to be consistent with alwaysfreelook (the only one that wasn't the same)

Controller defaults: Set Ring Toss to right trigger instead of left trigger

See merge request !370

Change 2p controller defaults

See merge request !369

Add OS and 32/64-bitness to VERSION console command

See merge request !368