add back nfs and nfs4 file systems

Fix gentoo bug #427996 correctly.
We should attempt to mount the file systems, but not try to start the
daemons. The previous fix removed mounting the file systems as well as
starting the daemons.

X-Gentoo-Bug: 508574
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=508574
Add NEWS file
runscript.sh: add chroot support

This adds support for a chroot variable which will be passed to the
start-stop-daemon --chroot switch to runscript.sh when starting a
daemon. This also needs to be saved so it can be used in locating the
pid file when stopping the daemon.

X-Gentoo-Bug: 524388
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=524388
librc:look for the pid file in a chroot if defined

X-Gentoo-Bug: 524388
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=524388
Update news file wrt chroot variable