This commit adds a suggestion for next_node.name, changes the example to nextnode.yourdomain.net and adds a hint, that browsers may open the searchpage if the hostname does not contain a dot.
gluon-core: dns-cache documentation polish
Now its clear that upstreams severs normally means "community gateways".
* added cacheentries to description
* made upstream server description more general
* description of the A and AAAA-records for next_node added
* mention of Cache not being allocated when not set in site.conf
* dns-cache doku polish
