More OpenGL optimizations
Full type information output for Lua documentation. Very useful for writing Lua scripts.
A new -weaponspew command-line option for printing MediaVP-style statistics, plus a weapon comparison spreadsheet, to the debug log.
Improved ship lookup behavior in SEXPs for improved performance.
BPTC/BC7 texture compression support
Refactoring and new features for the ship lab.
Missile multi-lock. It's finally in an official build!
Enhancements to the model code in preparation for cool features in 21.2.
IPv6 support for multiplayer
A lot of general fixes for multiplayer.