This patch adds the mdevd[1] plugin from Andy's fork of Finit, only
minor whitespace adjustment and group fix introduced, along with
updates to configure.ac and the documentation.
Currently the hotplug.sh calls mdevd-coldplug (instad of mdev -s), but
since mdevd is not guaranteed to have started and be ready, it is also
started with mdevd -C. A better solution is to use the s6 notify code
to synchronize the start of mdevd-coldplug. Support for this is coming
soon to Finit.
[1]: https://github.com/hongkongkiwi/finit/blob/master/plugins/mdevd.c
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Joachim Wiberg