MFH r374144, r374594, r374674, and r374681.

r374144:
	Rename bs and fish to avoid conflicts with games/bs and shells/fish.
	While here, get on board with @dir.
r374594:
	Fix a bounds-checking typo in trek. The number of sectors was being used
	to check input for the quadrant, and NSECTS > NQUADS.
r374674:
	Since r367027, the setgid games have been installed as setgid root
	instead of setgid root. The port redefines BINGRP when necessary,
	but since BINGRP was being passed in MAKE_ARGS, it overrode those
	redefinitions. Passing BINGRP in MAKE_ENV instead should allow
	uidfix to still work, while making sure that the games are installed
	with the correct group.
r374681:
	Revert the contents of r374674, as it broke packaging as a regular
	user. Instead, set the group and mode manually in the plist.

Approved by:	portmgr (antoine)