Use POSIX shell in ifconfig.sh.in
Some user-define shells, like /bin/csh
on FreeBSD won't work with the
config.guess
file:
+ /bin/csh /var/tmp/gitlab_runner/builds/YdCaoq4b/0/mnowak/bind9/config.guess
timestamp=2018-02-24: Command not found.
me=config.guess: Command not found.
Unmatched '"'.
An Automake-identified POSIX-compliant shell should be used instead.