Kubernetes moves informer and controller to pkg/client/cache, see:
https://github.com/kubernetes/kubernetes/pull/32718

As a result, coredns build is broken.

This fix fixes the build by making related change with kubernetes.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Removed lumberjack from coremain

As is mentioned in 251, this fix removed lumberjack from coremain.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Remove lumberjack from log middleware

As mentioned in 251, lumberjack is not suitable for applications like CoreDNS
so it is removed from the log middleware.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Update log/README.md as lumberjack has been removed
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Adjust default log output from `ioutil.Discard` to `os.Stdout`
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Stop the caddy message and start our own init notifications.
Log the version of CoreDNS when starting up.
Fix all middleware's setup functions so that return the error prefixed
with *which* middleware was failing; leads to better debuggable errors
when starting up.

Fix some of the documentation in the process.

Move all (almost all) Go files in middleware into their
own packages. This makes for better naming and discoverability.

Lot of changes elsewhere to make this change.

The middleware.State was renamed to request.Request which is better,
but still does not cover all use-cases. It was also moved out middleware
because it is used by `dnsserver` as well.

A pkg/dnsutil packages was added for shared, handy, dns util functions.

All normalize functions are now put in normalize.go

This commit adds a simple test of `TestHealth` for the middleware
of health so that there is basic coverage.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Change to be inline with latest caddy changes, caddy.CaddyfileFromPipe
requires servertype argument.

Fixes: #243

* play around with fs idea

* docs and fix test

* better docs

Better logging for NSEC3

When dropping NSEC3 records provide better logging and add test
for NSEC3 records.

Update the file and dnssec docs and glarify what is implement and that
we only do NSEC.

Fix the code copied from Caddy to refer to Corefile and make 'coredns'
with flags pickup a local Corefile.

Also remove some references to Caddy in the docs and output of coredns.

Fixes #235

There is no good reason to be different than Caddy and allows us to
piggyback on it's documentation.

Adjust documentation for k8s and put contents of the k8sCorefile
in the README.md

See
https://github.com/mholt/caddy/commit/17709a7d3f1a6ee0c34bdb81c6332b1339ea7085
where there was a slight change (for the better) on how to register.

Fix the CoreDNS to adhire to this. Needs Caddy from master to compile at
this moment.

Fix "just push to master, because I know better" compilation error.

The will prolly make automatic releases easier.

Set version and name of the program. And then call coremain.Run().

The coremain split makes CoreDNS embeddable.

Also see #189 for an old PR.

* Adding debug message when starting k8s controller

* Adding work-around for timing issue in k8s integration tests

* Remove unused import

* Fix Makefile for ast package

* Increase k8s verbosity in travis

* Updating TODO list to find root cause of test issue

* go fmt cleanup

Second set of grammatical fixes

Grammatical fixes.

Grammatical fixes.

Some grammatical fixes to various README.md files

Grammatical fixes.

Grammatical fixes.

Grammatical fixes.

Grammatical fixes.

Grammatical fixes.

Grammatical fixes.

Grammatical fixes.

Grammatical fixes plus correction of the reverse-mapping zone for 10.0.0/24.

Grammatical fixes.