dnsmasq: allow for dnsmasq instances to reuse default dnsmasq.conf

By defining 'listen-address' in the global dnsmasq.conf file we
prevent other instances of dnsmasq from using the global config as we
will get an error that the address is already in use. Instead we pass
'local-service' when we start the main dnsmasq instance which will
listen on the loopback address as well as any other local
subnets. This will allow the main dnsmasq instance to play nice with
other instances we might start for network-manager, libvirt, lxc...

Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>

meta-networking/recipes-support/dnsmasq/files/dnsmasq-noresolvconf.service

@@ -6,7 +6,7 @@ After=network.target
 Type=forking
 PIDFile=/run/dnsmasq.pid
 ExecStartPre=/usr/bin/dnsmasq --test
-ExecStart=/usr/bin/dnsmasq -x /run/dnsmasq.pid -7 /etc/dnsmasq.d
+ExecStart=/usr/bin/dnsmasq -x /run/dnsmasq.pid -7 /etc/dnsmasq.d --local-service
 ExecStop=/bin/kill $MAINPID
 ExecReload=/bin/kill -HUP $MAINPID
 

meta-networking/recipes-support/dnsmasq/files/dnsmasq-resolvconf.service

@@ -6,7 +6,7 @@ After=network.target
 Type=forking
 PIDFile=/run/dnsmasq.pid
 ExecStartPre=/usr/bin/dnsmasq --test
-ExecStart=/usr/bin/dnsmasq -x /run/dnsmasq.pid -7 /etc/dnsmasq.d
+ExecStart=/usr/bin/dnsmasq -x /run/dnsmasq.pid -7 /etc/dnsmasq.d --local-service
 ExecStartPost=/usr/bin/dnsmasq-resolvconf-helper start
 ExecStopPre=/usr/bin/dnsmasq-resolvconf-helper stop
 ExecStop=/bin/kill $MAINPID

meta-networking/recipes-support/dnsmasq/files/dnsmasq.conf

@@ -77,7 +77,7 @@ bogus-priv
 #except-interface=
 # Or which to listen on by address (remember to include 127.0.0.1 if
 # you use this.)
-listen-address=127.0.0.1
+#listen-address=127.0.0.1
 
 # On systems which support it, dnsmasq binds the wildcard address,
 # even when it is listening on only some interfaces. It then discards