middleware/file: Support delegations (#124)

Return a delegation when seeing one while traversing the tree in
search of an answer.

Put the SOA and NS record in the zone.Apex as these are to be handled
somewhat special.

Lowercase record on insert to make compares easier. This lowercases
all RR that have domain names in their rdata as well.

1 files changed, 12 insertions, 13 deletions

diff --git a/README.md b/README.md
index 083b4c58f..b5a458097 100644
--- a/README.md
+++ b/README.md
@@ -10,27 +10,27 @@ and a few others). CoreDNS should be stable enough to provide you with a good DN
 
 Currently CoreDNS is able to:
 
-* Serve zone data from a file, both DNSSEC (NSEC only atm) and DNS is supported. Delegation are
-    *not* supported as yet.
+* Serve zone data from a file, both DNSSEC (NSEC only) and DNS is supported.
 * Retrieve zone data from primaries, i.e. act as a secondary server.
+* Loadbalancing of responses.
 * Allow for zone transfers, i.e. act as a primary server.
-* Use Etcd as a backend, i.e. a 92% replacement for
+* Use etcd as a backend, i.e. a 94.5% replacement for
   [SkyDNS](https://github.com/skynetservices/skydns).
 * Serve as a proxy to forward queries to some other (recursive) nameserver.
 * Rewrite queries (both qtype, qclass and qname).
 * Provide metrics (by using Prometheus).
 * Provide Logging.
-* Provide load-balancing of returned responses.
+* Provide load-balancing (A/AAAA shuffling) of returned responses.
 * Has support for the CH class: `version.bind` and friends.
 
-There are corner cases not implemented and a few [issues](https://github.com/miekg/coredns/issues).
+There are still few [issues](https://github.com/miekg/coredns/issues), and work is ongoing on making
+things fast and reduce the memory usage.
 
-But all in all, CoreDNS should already be able to provide you with enough functionality to replace
-parts of BIND9, Knot, NSD or PowerDNS.
-
-However CoreDNS is still in the early stages of development. For now most documentation is in the
-source and some blog articles can be [found here](https://miek.nl/tags/coredns/). If you do want to
-use CoreDNS in production, please let us know and how we can help.
+All in all, CoreDNS should be able to provide you with enough functionality to replace parts of
+BIND9, Knot, NSD or PowerDNS.
+Most documentation is in the source and some blog articles can be [found
+here](https://miek.nl/tags/coredns/). If you do want to use CoreDNS in production, please let us
+know and how we can help.
 
 <https://caddyserver.com/> is also full of examples on how to structure a Corefile (renamed from
 Caddyfile when I forked it).
@@ -86,10 +86,9 @@ All the above examples are possible with the *current* CoreDNS.
 
 * Website?
 * Logo?
-* Code simplifications/refactors.
 * Optimizations.
 * Load testing.
-* All the [issues](https://github.com/miekg/coredns/issues).
+* The [issues](https://github.com/miekg/coredns/issues).
 
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