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 !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 !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