* mw/kubernetes: rewrite parseRequest

Stop looking at the qtype in parseRequest and make k.Namespace a map.
Fallout from this is that pkg/strings as it is not used anymore. Also
add a few helper functions to make unexposed namespaces easier to see in
the code.

Add wildcard tests to the middleware tests.

* Fix tests

Add a whole bunch of comments to document what we are trying to do.

* This is now answered

* up coverage

* duh

* Update testcase

* Make it nodata

Upstream allows file structured like /etc/resolv.conf. Update docs.

Fixes #709

Fixes #965

* core: hide registerHandler

Remove RegisterHandler and just make it implicit when we look at the
handler compilation step.

* Rename GetHandler to just Handler

Update callers and make auto check Hander in OnStartup.

* Up test coverage in erratic

* up test coverage

Briefly highlight that autopath might return the wrong results to pods
in different namespaces.

Fixes #778

$INCLUDE was fixed in miekg/dns, create tests in CoreDNS so that we know
we have the latest version.

Fixes #880

Yes, the previous Go version is important but this doubles the wait on
travis. This drops 1.7 from travis. This means we wait for bug reports
to show up, or tell people to use the precompiled binaries are docker
containers.

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

It looks like the cached path
- `$GOPATH/src`
- `$GOPATH/pkg`
overlaps with the source path of
`$GOPATH/src/github.com/coredns/coredns`.

Disable the cache for now.

May enable cache in the future if we could exclude
`$GOPATH/src/github.com/coredns/coredns` from `$GOPATH/src`.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

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

For profiling the time spent in Travis CI.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Not needed and already done in the other test (bench is not looked at
at all)

Make it its own package as shared between autopath and federation.

Fixes #933

* travis: parallize builds

* trying out stuff

* order matters

* Add dnsutil.Join

* Create dnsutil.Join

Create Join helper function and move bits in the code over.

This is more general and aligns well with the other methods.
Also allows the kubernetes middleware to use it.

Fixes #940

* mw/kubernetes: remove zone from parseRequest

State has the zone info as well, so don't need to have it in
parseRequest anymore.

* Fix up tests

* improve test coverage

* mw/federaration

This PR add the federation back as a middleware to keep it more
contained from the main kubernetes code.

It also makes parseRequest less import and pushes this functionlity down
in the k.Entries. This minimizes (or tries to) the importance for the
qtype in the query. In the end the qtype checking should only happen
in ServeDNS - but for k8s this might proof difficult.

Numerous other cleanup in code and kubernetes tests.

* up test coverage

Add integration test with erratic. For this erratic now also returns an
autopath searchpath. This tests the whole chain; i.e registring a
searchfunction and calling that from autopath.

This tests does a autopathing domain and a non-autopathing one.

Add a non-arpa testcase to the reverse test.

There was quite some code duplication in a lot of tests to check if
an answer was considered Ok. Created a test.SortAndCheck helper function
that takes care of this.

Only IP:Port or file name is allowed.

This PR adds a reverse tests that copies some of it from the main
integration test. This aids in local testing because you don't need
a full k8s setup running.

It does the most minimal testing, a successful return and a nodata
response that includes the SOA for in-addr.arpa.

* mw/kubernetes: reverse zone in ZONE stanza not parsed

Properly parse the reverse zone syntax in the ZONES stanza as promised
in the README.

As short test case to test.

* add test

* mw/kubernetes: remove federation and cidr

Remove both as we have a corefile syntax change that handles cidr and
remove federation because that is going to be its own middleware.

* backwards incompat changes

This PR:
* removes cidr from kubernetes (core Corefile feature now)
* removes federation from kubernets (comes back as new middleware)
* [remove autopath - which was already gone, so that already was
  backwards incompat]
* adds `fallthrough` to the *etcd* middleware and makes you enable it.
* Fail on unknown properties
* documentation
* Disable TestHealthCheck as it uses realtime and fails

* cidr everywhere: check all middleware

Add tests for cidr in only that middleware that already tests for this.
Check the other ones manually (and put reverse in the tests cases
anyway).

Make etcd setup_test run without +build etcd tag - it is not needed
for this test - move rest of the code to lookup_test.go.

Cleanup proxy test a bit and remove TempDir as there is test.TempFile
that does the same thing.

Fixes #909

* coredns package

* Fix test compile

* Consolidation of Makefile and Makefile.release

Several changes:
1. All go specific target like `go generate`, etc. has
been moved to Makefile. Now Makefile.release does not
repeat go build, etc. related rules.
2. In Makefile.release, the binary build is done through
`docker run` and with a fixed specific go version (currently 1.8.3).
This will help making sure build process could be reproduced
on any dev platform, with no dependency to the golang version
installed on the platform.
3. Platform related flags (e.g., "GOOS=darwin") are passed through
Makefile (not Makefile.release).
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* Update to only use `make` without running inside `docker run`
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

The logo is pointing to https://coredns.io/images/CoreDNS_Colour_Horizontal.png
and provides the link to https://coredns.ioSigned-off-by: Yong Tang <yong.tang.github@outlook.com>

Split version string into two, before:
```
2017/08/12 19:43:08 [INFO] CoreDNS-010
linux/amd64, go1.8.3, a6d2d7b5
CoreDNS-010
linux/amd64, go1.8.3, a6d2d7b5
```
After:
```
root@9bd51ffc39aa:/go/src/github.com/coredns/coredns# ./coredns
.:53
2017/08/12 19:12:59 [INFO] CoreDNS-010
2017/08/12 19:12:59 [INFO] linux/amd64, go1.8, a6d2d7b5
CoreDNS-010
linux/amd64, go1.8, a6d2d7b5
```
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

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

Remove unused distclean and misc.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Now the output would be:
```
 ./coredns -version
CoreDNS-010
linux/amd64, go1.8, 241e3dbc
```
In case the local file has been modified, then the output would be (with --dirty):
```
 ./coredns -version
CoreDNS-010
linux/amd64, go1.8, 241e3dbc-dirty
```
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

The primary driver for autopath was kubernetes.  It addresses a specific need in kubernetes, so it deserves a mention in the K8s README, with an example.

* mw/k8s: cleanups

Remove some constants that aren't used any more. Make PrimaryZone
private because it doesn't need to be exported. Remove test that
did not cover corner case as expressed in setup.go

* cleanup this as well

Found a few typos, spelling, and grammar errors.

remove extraneous "]"s from the syntax def...

* mw/k8s: Test Federation parsing

The test case was there, but there was nothing testing it?!?!?!
Add it and split it out of the main setup test which is too long
already.

Also allow kubernetes a not have a ZONE, just default to the serverblock
in that case. Remove test that was blocking that.

Cleanup up the readme more.

* rewrite README

Remove k.defaultNSMsg() it is just one line of getting the service and
it is another method that needlessly uses recordRequest.