corerouter/gateway: configure olsrd6 solely for name resolution

Might be an unconventional approach, but is at the moment
the only turnkey solution to get us basic hostname resolution for
ipv6.

Routing is of course /dev/zero'ed.

roles/cfg_openwrt/templates/corerouter/config/olsrd6.j2

@@ -0,0 +1,53 @@
+#jinja2: trim_blocks: "true", lstrip_blocks: "true"
+config LoadPlugin
+	option library 'olsrd_nameservice'
+	option suffix '.olsr6'
+	option hosts_file '/tmp/hosts/olsr6'
+	option latlon_file '/tmp/_unused_olsr6_latlon.js'
+	option services_file '/tmp/_unused_olsr6_services'
+
+config LoadPlugin
+        option accept '::'
+        option ipv6only 'true'
+        option library 'olsrd_jsoninfo'
+        option ignore '0'
+
+config olsrd
+	option IpVersion '6'
+	option FIBMetric 'flat'
+	option AllowNoInt 'yes'
+	option TcRedundancy '2'
+	option NatThreshold '0.75'
+	option LinkQualityAlgorithm 'etx_ff'
+	option SmartGateway 'no'
+	option Pollrate '0.025'
+	option LinkQualityLevel '2'
+	option OlsrPort '698'
+	option Willingness '3'
+	option TosValue '16'
+	option RtTable '666'
+	option RtTableDefault '666'
+
+config InterfaceDefaults
+	option MidValidityTime '500.0'
+	option TcInterval '2.0'
+	option HnaValidityTime '125.0'
+	option HelloValidityTime '125.0'
+	option TcValidityTime '500.0'
+	option MidInterval '50.0'
+	option HelloInterval '15.0'
+	option HnaInterval '30.0'
+
+{% for network in networks | selectattr('role', 'equalto', 'mesh') %}
+config Interface
+	option ignore '0'
+	option interface '{{ network['name'] if 'name' in network else network['role'] }}'
+	option Mode '{{ 'ether' if network.get('ptp') else 'mesh' }}'
+{% endfor %}
+
+{% for tunnel in networks | selectattr('role', 'equalto', 'tunnel') %}
+config Interface
+	option interface '{{ tunnel['ifname'] }}'
+	option Mode 'ether'
+	option ignore 0
+{% endfor %}

roles/cfg_openwrt/templates/gateway/config/olsrd6.j2

@@ -0,0 +1,49 @@
+#jinja2: trim_blocks: "true", lstrip_blocks: "true"
+config LoadPlugin
+	option library 'olsrd_nameservice'
+	option suffix '.olsr6'
+	option hosts_file '/tmp/hosts/olsr6'
+	option latlon_file '/tmp/_unused_olsr6_latlon.js'
+	option services_file '/tmp/_unused_olsr6_services'
+
+config LoadPlugin
+        option accept '::'
+        option ipv6only 'true'
+        option library 'olsrd_jsoninfo'
+        option ignore '0'
+
+config olsrd
+	option IpVersion '6'
+	option FIBMetric 'flat'
+	option AllowNoInt 'yes'
+	option TcRedundancy '2'
+	option NatThreshold '0.75'
+	option LinkQualityAlgorithm 'etx_ff'
+	option SmartGateway 'no'
+	option Pollrate '0.025'
+	option LinkQualityLevel '2'
+	option OlsrPort '698'
+	option Willingness '3'
+	option TosValue '16'
+	option RtTable '666'
+	option RtTableDefault '666'
+
+config InterfaceDefaults
+	option MidValidityTime '500.0'
+	option TcInterval '2.0'
+	option HnaValidityTime '125.0'
+	option HelloValidityTime '125.0'
+	option TcValidityTime '500.0'
+	option MidInterval '50.0'
+	option HelloInterval '15.0'
+	option HnaInterval '30.0'
+
+{% if mesh_links is defined and mesh_links|length>0 %}
+  {% for interface in mesh_links %}
+config Interface
+	option ignore '0'
+	option interface '{{ interface['name'] }}'
+	option Mode '{{ 'ether' if interface.get('ptp') else 'mesh' }}'
+  {% endfor %}
+{% endif %}
+