* mw/chaos: update docs

Fix/update the documentation: make the corefile snippets tested and
expand them a little. Show `dig` example.

Fixes #1050

* dot

* mw/whoami: update docs

Parse the corefile in the readme_test.go and other tweaks to the docs.

Fixes #1049

* trailing

* remove the 53 port

Use a new port for every instance.

* Initial adopters list

* Remove one until approved

* Fix typo

If a README has a corefile snippet that is annotated with `corefile`,
this test will parse the instance and checks the snippet is legal.
This means a) we will get better docs b) we know for sure everything
still parses.

The test parses everything in middleware/*/README.md, it does not check
for README presence, just Corefile snippets. The port used is 10053 and
overrides whatever port is set in the docs.

The secondary middleware was used as an example and adds two examples
that should parse.

failures show up as:

~~~
--- FAIL: TestReadme (0.04s)
	readme_test.go:50: Testing ../middleware/secondary/README.md, with 100 byte snippet
	readme_test.go:50: Testing ../middleware/secondary/README.md, with 93 byte snippet
	readme_test.go:53: Failed to start server for input "middleware/secondary: Corefile:3 - Error during parsing: unknown property 'transfeT'":
		. {
		    secondary example.net {
		        transfeT from 10.1.2.1
		        transfer to *
		    }
		}
FAIL
~~~

Improve the syntax tests for this middleware.

* Add EDNS0_SUBNET rewrite

* Fix review comments

* Update comment

* Fix according to review comments

* Add ResponseWriter6 instead of parameterized the existing ResponseWriter

* mw/etcd: revert 'add fallthrough'

This removes 'fallthrough' for *etcd* which is not needed. This was
added in 00f5c779 but is totally not needed and creates backwards
incompat behavior even.

Thanks to @johnbelamaric for pointing this out in #925.

* remove here as well

* Revert "remove here as well"

This reverts commit 9d44397827425e567af01d43564c4294b42e98c9.

* Revert "mw/etcd: revert 'add fallthrough'"

This reverts commit 0cfe3cb1ab5495ed38a8a0486e3f5386f3bd95dc.

* mw/{etcd,kubernetes}: use fallthrough correctly

reverts of reverts, will rebase and squash later.

Maybe a fix for #1031 ?

Mention stubdomains in the documentation, give an example  and fix a few
typos.

Fixes #1028

* mw/autopath: correct type for type switch

Use pointer to kubernetes as that is what is registered. Fix up
federation which had the same mistake.

* here

Fix parse error and add testcase when a ZONE is specified.

Fixes #1024

Move tests infra to look like all other middleware, and some small
cleanups.

* mw/proxy: simplify google code

Minimize bootstrap code a bit, and block on the first resolve of the
google https endpont. Add more logging and include actual error in the
returned errors.

Also re-resolve every 120 seconds, instead of 300 (might eventually make
this an option).

* fix test

, so that `make test` will pass by default.

Also fixed several ineffassign and golint issues.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

See #997 #1000.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* mw/dnssec: improve docs

Improve the docs: add example and details the perrils of having multiple
*dnssec* middlewares in one zone.

* better

* adds the option to log to a remote endpoint

* examples

* tests

* tcp:// or default to unix://

* cosmetic update

* bad naked returns

* experimental dnstap support into proxy

* proxy reports dnstap errors

* refactoring

* add a message builder for less dnstap code

* msg lint

* context

* proxy by DNS: dnstap comments

* TapBuilder

* resolves conflict

* dnstap into ServeDNS

* testing

* more tests

* `go lint`

* doc update

* mw/kubernetes: move fallthrough tests out

Remove the testcase duplication and put fallthrough tests in separate
file.

Also make some names shorter and more descriptive.

* fix test build

* fix corefile

fail startup when dnssec middleware has keys configured that can't be
used to sign any of the responses it should sign.

More tests added, including ones that actually trigger setup failures.

Check for a nil message and if we have a question section. Request is
usually called with an external Msg that already saw validation checks,
but we may also call it from message we create of our own, that may or
may not adhire to this. Just be more robust in this case.

This PR reverts a previous commit that was applied to master.

Check if msg is nil in DefaultErrorFunc. If this is the case log this
and short cut the function.

Hoping to get more insight in #925

* mw/kubernetes: split integration tests

* separate file and test for api fallthrough, does not need all other
  servers to be started.
* more split ups: make it clear when or when not we need an upstream server,
  as just needlessly start it in doIntegrationTests.
* use identifiers from dns package -> "TypeSRV" -> dns.TypeSRV, as there
  is no need to reinvent these.

* updates

* deploy work-around

* re-add weird sleep

Reloading caddy won't kill the health handler. Only on final shutdown
we stop the handler.

Currently when reloading CoreDNS with -SIGUSR1 the health handler stops
answering - there is a test for this but it doesn't capture whole
process reloading, sadly. This PR keeps the handler alive during reloads
and only stops on process shutdown.

* dep ensure -update

Run "dep ensure -update` to update all dependencies.

No code changes; just the dependencies.

* dep prune

* add new venderod

This add the infrastructure to let other middleware report their health
status back to the health middleware. A health.Healther interface is
introduced and a middleware needs to implement that. A middleware
that supports healthchecks is statically configured.

Every second each supported middleware is queried and the global health
state is updated.

Actual tests have been disabled as no other middleware implements this
at the moment.

Go vet warning: fix use of context.

Fixes #997

Also make *auto*'s reload test less flaky by retrying
and then giving up.

To align with #992
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* mw/kubernetes: add configurable TTL

Add ttl option to kubernetes. This defaults to 5s but allows
configuration to go up to 3600.

Configure the tests so that a few actually check for the 5s, while the
rest use the TTL of 303 which is ignored by the checking code.

Fixes #935

* fix tests

* and more

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Start CoreDNS instance in call Restart() on it.

changes in Caddy caused mw/root tests to fail: https://github.com/mholt/caddy/commit/4cce8c7b6bf08ffff5e30999aa49259324d58f5d (#990)

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

block chaos queries, unless the chaos or proxy middleware is loaded. We
respond with REFUSED.

This removes the need for each middleware to do this class != ClassINET
if-then.

Also make config.Registry non-public.

* Remove createTestServer

* more cleanups

* comment tweak

* sort

* sigh