install /etc/mail/sendmail.cf to /etc/mail/sendmail.cf and exits with an
error:
===> etc/sendmail
install -c -o root -g wheel -m 644 /etc/mail/sendmail.cf /etc/mail/sendmail.cf
install: /etc/mail/sendmail.cf and /etc/mail/sendmail.cf are the same file
*** Error code 64
Catch this in the Makefile and don't call install if the source and target
are the same file.
Reported by: Alexandr Listopad <laa@reis.zp.ua>
MFC after: 1 week