Bug#841734: /etc/init.d/exim4: usage string reports the "what" options which doesn't exist

[Daniele Forsi]

Package: exim4-base 
Version: 4.87-3+b1
Severity: normal
File: /etc/init.d/exim4

Dear Maintainer,

running "/etc/init.d/exim4" prints
Usage: /etc/init.d/exim4 {start|stop|restart|reload|status|what|force-stop}
but the "what" option isn't handled in that script.

Exim version 4.87 #2 built 08-May-2016 12:03:10