htpdate init script Debian Wheezy compatibility

Please make the htpdate init script compatible with Debian Wheezy. I hacked together a version compatible with Wheezy. If you could test if these changes still work with Tails, that would be awesome!

#! /bin/sh
### BEGIN INIT INFO
# Provides:          htpdate
# Required-Start:    mountkernfs $local_fs $remote_fs $syslog networking
# Required-Stop:     $remote_fs $local_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Set time using HTP
# Description:       Set time using HTP
### END INIT INFO

First reply:

Sure, we’ll have to do that at some point. Thanks for pointing it out.

Please note that while this wiki is fine for tracking tickets, the tails-dev ML is better suited for discussing proposed patches. Therefore, I’ll reply with code review results once the discussion is started there.

Bonus points if every proposed atomic change is explained.

Parent Task: #6015 (closed)

Original created by @tails on 5529 (Redmine)