Allow users to have multiple dnsmasq instances by specifying different
`provision` values for the corresponding Shepherd services, similar to
what is done with `static-networking-service-type`.
* gnu/services/dns.scm (<dnsmasq-configuration>)[provision]: new option.
(dnsmasq-shepherd-service): Use supplied provision value.
* doc/guix.texi (DNS Services)[dnsmasq-configuration]: Document it.
Change-Id: I78c7f015cb1db239a600bc5373b2fd80e8b9b9f4
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
Reviewed-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
