'luajit' is used consistently in 25+ packages. Make it a global flag.
livecd - !!internal use only!! DO NOT SET THIS FLAG YOURSELF!, used during livecd building
lm_sensors - Add linux lm_sensors (hardware sensors) support
lua - Enable Lua scripting support
+luajit - Use dev-lang/luajit instead of dev-lang/lua (ineffective with USE=-lua)
lzma - Support for LZMA (de)compression algorithm
lzo - Enable support for lzo compression
m17n-lib - Enable m17n-lib support