Fix regression in P_SetupStateAnimation

Closes #1297

See merge request STJr/SRB2!2549

Skip unchanged value validation in CV_SetCVar if there is a can_change callback

Closes #1312

See merge request STJr/SRB2!2547

Merge branch '1317-using-the-keypad-to-type-numbers-in-the-server-address-textbox-inputs-them-twice' into 'next'

Remove keypad handling in M_HandleConnectIP

Closes #1317

See merge request STJr/SRB2!2548

Fix #1277

Closes #1277

See merge request STJr/SRB2!2509

Fix `AddonLoaded` hook

See merge request STJr/SRB2!2555

Add "AddonLoaded" Lua hook

See merge request STJr/SRB2!2405

GitLab CI: timeout apt-get update command with 2 minutes

See merge request STJr/SRB2!2553

There is no need to have that code anymore, since keypad presses also generate ev_text events.
Additionally, made text fields in menus ignore ev_keydown events if they are keypad keys.

Fix Lavafalls crashing the game when scaled down.

See merge request STJr/SRB2!2544

Fix inconsistency in master server listing

See merge request STJr/SRB2!2539

Disinclude unused function when NOMD5

See merge request STJr/SRB2!2530

Use FF_SEMIBRIGHT for some more common objects

See merge request STJr/SRB2!2541

Disable UDMF console notice

See merge request STJr/SRB2!2542

Enable OpenGL palette rendering by default

Closes #1301

See merge request STJr/SRB2!2543

Ban by /64 by default instead of /128

See merge request STJr/SRB2!2534

Fix polyobject midtextures being stretched into infinity

Closes #1302

See merge request STJr/SRB2!2535

Fix holes in FOF due to culling

Closes #1308

See merge request STJr/SRB2!2533

Fix lag when touching collected emblems

Closes #1306

See merge request STJr/SRB2!2536

Fix skybox and horizon lines not being batched

Closes #1303

See merge request STJr/SRB2!2532

Remove select-related testing functions

See merge request STJr/SRB2!2523

Fix buffer overflow when registering a dedicated build server on MS

See merge request STJr/SRB2!2525

Fix potential segfault when flat images has changed on netcode

See merge request STJr/SRB2!2527