#: /usr/local/initfoo/etc/rc.d/init.d/sendmail:87
msgid "Usage: sendmail {start|stop|restart|condrestart|status}"

If "sendmail" is replaced with $0 here, this message can be reused in
translations (other usage messages use $0), so that translators won't have
to translate each similar message individually. To make it more clear, what
I suggest is:

"Usage: $0 {start|stop|restart|condrestart|status}"