server: use 2.60b-style version string in infoResponse/statusResponse, fixes #606

HLSW now shows ET:L servers as "ET - Legacy" instead of Q3Comp
client: color escape in cvar completion and serverstatus cmd, refs #639
ui: unused code commented, refs #50
qcommon: var scope/optimized trace functions
Merge branch 'master' of https://github.com/etlegacy/etlegacy.git
misc: code cleanup