The Sep 10, 2019 version of awk introduced a change in handling this:
ifconfig egress | awk '/inet / {FS="[ .]"; print "host-"$4"-"$5"}'
Given a line like
inet 10.20.30.40 netmask 0xffffff00 broadcast 10.20.30.255
it used to return host-30-40, now it returns host-0xfffffff0-broadcast.
The new behaviour is the same as gawk and old behaviour can be obtained
by doing this instead
ifconfig egress | awk -F '[ .]' '/inet / {print "host-"$4"-"$5}'
I don't know which is "correct" (the manpage isn't enlightening) but
it was a bit unexpected so I wanted to at least draw attention to it
in case it breaks somebody else's script.
