(cherry picked from commit be14b8a564a89a5afb84ac19f1586f3db7f68367)

Make the HTTP Master Server official

See merge request KartKrew/Kart-Public!193

Bump MAXNETNODES to 127

See merge request !192

Clarify addon-related messages

See merge request !190

Fix memory leak in W_ReadLumpHeaderPwad

See merge request !182

Fix user agent for HTTP downloads being set as SRB2Kart/v1.1.2

See merge request KartKrew/Kart-Public!185

Ogl colormap fix third attempt

See merge request !184

clientside ack fix

See merge request !186

Stops the client from using reliable packets before joining a server
Clients can time out during addon loading
sending reliable packets before then can cause out of order acks
This causes joinbug, chatbug, and chatspam, as well as
general server instability due to unnecesary packetspam

Fix bug in the OpenGL colormap bugfix

See merge request !183

Fix bug in OpenGL encore colormaps

See merge request !180

Fix opengl crashing on startup due to lack of checks

See merge request !179

Also fixes the log file not being written to the home directory.

Fix clang compiling

See merge request KartKrew/Kart-Public!176

Some uninitialised variables that GCC 4.4 complains about

See merge request KartKrew/Kart-Public!177

Fix visplane getting allocated twice

See merge request !172

This should be okay since 0 generally means "nothing" for these, and they should always be set before being used later on.

Fix Travis Deployment

See merge request !174

Also apply HUD translucency to FREE PLAY

See merge request !161

Fix wrong orientation in some boost pads in ogl

See merge request !173

I'm not 100% sure why we can't use newer series to build the newer installers. But this seems to be what vanilla does

Fix GCC 10 linking errors

See merge request !170

Write empty file on clearbans

See merge request !156

Fix "NOMIXER" flag compiling

See merge request !159