Make UI_CVAR_CREATE use VM specific code

Makes cvar be flagged as VM created and unset ROM if ARCHIVE is set.
Remove the SMP renderer feature
Update README
Fix some SMP bits I missed
Starting sunlight experimentation branch
Merge branch 'HEAD' of https://github.com/ioquake/ioq3.git into suntest
Fix MSG_ReadDeltaKey setting bit 1<<bits often

MSG_ReadDeltaKey would often set 1<<bits, it should never be set. It exceeds the size of what was being read.
Worked okay for weapons/forward/right/up as they stored as chars (value would wrap around to correct value, lucky).
Angles had the wrong value, not sure if it was causing issues.
Remove some unused defines from msg.c
Use Q_strncpyz in G_AddRandomBot
Remove MSG_WriteDeltaUsercmd and MSG_ReadDeltaUsercmd
Merge Reaction renderer features, remove "#ifdef REACTION"s
Merge branch 'reactionmerge'
Increase favorite address buffer size in Team Arena UI

Now it can hold an IPv6 address.
Fix creating favorite when not on view favorite servers
Merge branch 'master' of https://github.com/ioquake/ioq3
Fix resolving IPv6 favorites in Team Arena UI
Extend Team Arena Favorite Address edit field to hold an IPv6 address
Fix IPv6 favorites in q3_ui

This does however allow favorites to contain hostnames which was explicitly not allowed before.
Fix renderering TrueType Fonts in Rend2

Reported by Axel Isouard (exidl)
Unify/cleanup max snapshot entities on client and server