=====
# Id line
#
# RESTRICTED: restricted_port_1 (comment1)
# RESTRICTED: restricted_port_2 (comment2)
#
# BROKEN: broken_port_3 (comment3)
# BROKEN: broken_port_4 (comment4)
# BROKEN: broken_port_5 (comment5)
#
SUBDIR= good_port_1 good_port_2 ...
=====
Basically, the idea is to make it easy to find restricted or broken
ports by doing a "grep".