Fix buffer overflow when displaying a scrolling background

See merge request STJr/SRB2!2010

Fix memory leak when other players are riding a minecart

See merge request STJr/SRB2!2146

Fix CMake Compiling

Closes #1116

See merge request STJr/SRB2!2157

Fix minor spelling mistake

See merge request STJr/SRB2!2154

Re-delete netcode

See merge request STJr/SRB2!2083

Respect the player's skin and color selection

See merge request STJr/SRB2!2100

Fix "-warp"ing to a level without a map header crashing the game

Closes #1105

See merge request STJr/SRB2!2143

CircleCi: update buildbot

See merge request STJr/SRB2!2144

Disable renderhitbox in multiplayer altogether

See merge request STJr/SRB2!2142

Fix floorsprite rendering with 1x1 images

Closes #1052

See merge request STJr/SRB2!2141

Replace CV_NETVAR with CV_NOTINNET for cv_renderhitbox (Fixes #1103)

Closes #1103

See merge request STJr/SRB2!2140

Expose skin.supername to Lua

See merge request STJr/SRB2!2138

Optimize sprite rendering by ignoring completely occluded sprites

See merge request STJr/SRB2!2131

Interpolate Hitboxes when Scaling Mobjs

See merge request STJr/SRB2!2124

The CV_NETVAR flag being used for cvars not registered in a dedicated server context will completely mess with the internal netid to cvar linkage.
And I'm not really keen on registering a cvar purely for rendering on dedicated servers, so let's just prevent renderhitbox from being changed in netgames entirely.

Make camera noclip during NiGHTS gameplay

See merge request STJr/SRB2!2136