This will probably nip a possible issue
with player cmds getting read/wrote inconsistently
if a player joins or leaves.

This particularly allows a server to record the
first map after startup as a replay. Players
joining mid-map can no longer record replays tho

Mostly just disabling the parts of the replay that assume
a single player, right now.

# Conflicts:
#	src/g_game.c

Allow letters to be used in the "Specify IPv4 Address:" field

See merge request KartKrew/Kart-Public!36

also reduced the range of usable characters

Hopefully fix the MD2 crash reported

Closes #1

See merge request KartKrew/Kart-Public!35

I wasn't able to replicate it personally, but this should hopefully avoid it crashing where the RPT given pointed out.

Fix the netticbuffer command crashing 64-bit builds

See merge request KartKrew/Kart-Public!34

Merge upstream SRB2 changes

See merge request KartKrew/Kart-Public!33

Disable the APNG code if the version of libpng is greater than 1.4.

See merge request STJr/SRB2!457

Since supposedly the current code *can't* work with newer versions of libpng that have the apng patch, it won't compile if that's what people have.
It seems like some distros are adding the apng patch to libpng and that'll make things annoying to compile for people.
I think it goes without saying, but if there's ever a fix to make newer libpng versions work with the APNG code then this can be reverted.

- Update chars.kart hash, AGAIN!
- Fix spectators being visible on minimap when F12ing people
- Optimize how splitscreen players are drawn on top of the minimap
- Remove duplicated cvar registrations
- Move cv_resynchattempts and cv_netticbuffer from D_ClientServerInit to D_RegisterServerCommands and D_RegisterClientCommands respectively, so they can save to config properly
- Increase "Frequent" gametype switch frequency even more
- "SRB2" version dehacked warning ignores srb2.srb

This is in our changelog, but I didn't actually get around to doing it. Would've been foolish to ship with that :V

Caught while working on power levels -- turns out it wasn't a total waste of time when I should've been working on the rest of v1.0.2!