service: dnsmasq: Add 'locals' configuration option.

* gnu/services/dns.scm (<dnsmasq-configuration>)
[locals]: New field.
(dnsmasq-shepherd-service): Use it.
* doc/guix.texi (DNS Services): Document it.

Change-Id: I1c2bc86c1636aa82451d1a38959380c3791fd8d4

1 files changed, 6 insertions, 0 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index 7a8ec55b956..63cd99ac09c 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -38221,6 +38221,12 @@ When false, all reverse lookups for private IP ranges are answered with
 When true, dnsmasq queries the servers in the same order as they appear
 in @var{servers}.
 
+@item @code{locals} (default: @code{'()})
+Specify domain name @emph{patterns} which should be treated as local,
+that is, for which there should be no delegation to upstream servers.
+Provided pattern values should be of the form
+@code{'("/vpn.example.com/")}.
+
 @item @code{servers} (default: @code{'()})
 Specify IP address of upstream servers directly.