main/php: fix php-fpm script

ref #2685

The problem was that it usesd start-stop-daemon --exec but the argv[0]
name didnt correpond so start-stop-daemon could not know that it was up
and running.

The fix is to use pidfile.

Script is based on update from gentoo.
main/lxc: update to 1.0.4

quite a few bug fixes in 1.0.4:

https://linuxcontainers.org/news/
main/bind: remove duplicate depend function
main/sysklogd: update init.d script

import from gentoo

remove vserver specifics, use --signal for reload
main/vsftpd: post-install: dont exit with error if user exists
testing/powertop: upgrade to 2.6.1