Fixes #1564

* server: drop logging

Drop this log line; you have no control over it; it doesn't add that
much and can be used to easily ddos you.

* compile

Just happen to see these. Fix them.

Dont return here, but continue

error on startup when we see these in a corefile:

~~~
% ./coredns
2018/03/01 06:51:23 plugin/startup: this plugin has been deprecated
% ./coredns
2018/03/01 06:51:32 plugin/shutdown: this plugin has been deprecated
~~~

* plugin/deprecated: add an easy way to error on depcated plugin

* lint

* better docs

* slightly more docs

All these functions are namespaced by their package anyway; just use
setup().

* plugin/file: shutdown reload goroutine

Shutdown the z.Reload() routine (if started in the first place) on
shutdow and reload.

Fixes #1508

* Must be put in c.OnShutdown()

* up test coverage

* Easier way to dnstap?

* Remove unnecessary function parameter from Tapper

* golint

* golint 2

* Proxy dnstap tests

* README.md & doc

* net.IP

* Proxy test was incorrect

* Small changes

* Update README.md

* Was not reporting dnstap errors + test

* Wasn't working at all, now it's ok

* Thanks Travis

* plugins: Return error for multiple use of some

Return plugin.ErrOnce when a plugin that doesn't support it, is called
mutliple times.

This now adds it for: cache, dnssec, errors, forward, hosts, nsid.
And changes it slightly in kubernetes, pprof, reload, root.

* more tests

Log the remote's port, for IPv6 addr this means we should enclose the v6
address in brackets; make this the default for 'remote'.

godeps sets the external repos to the correct versions meaning we can
build CoreDNS.

Rename the constants to IP4arpa and IP6arpa (shorter and exported) and
make IsReverse return the type of the reverse zone which could be handy
for some callers.

Also add tests for IsReverse()

* better handle non PTR rev zone qrys

* vice versa

* tests

* comment typo

* much cleaner

This fix adds security report section in README.md
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

We are in incubating stage now:
https://lists.cncf.io/g/cncf-toc/topic/result_coredns_moving_to/12935200?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,12935200Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Capatilize coredns in ADAPTERS.md

This fix updates go dep with `dep ensure --update` as well as the following:
- Removed github.com/ugorji/go restriction in Gopkg.toml (fixes  #1557)
- Added github.com/flynn/go-shlex in Makefile (neede by Caddy, maybe removed later)

This fix fixes #1557
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

* add OverlapChecker, move the test of overlap AFTER the directive setup process, change key of configs to allow multiple same key

* glitch when rebase. init of Config should include the default host

* add tests for the registering of configuration
rename multicast in 'unbound'.
add comments on the validator

* - merged zoneAddr and addrKey that are very similar
- move maps of Validator to zoneAddr, avoinding need to have string representation of zoneaddr
- moving key build for saving Config at Config side instead of dnsContext

* - UT on saving config is now useless.

* - cannot cleanup access to Configs after setup. Deferred function to Start, use it

* - cleanup register unit tests. remove useless function

* - address comments of review. name of validator, comments, simplify registerAndCheck

* - fixes after review. renaming a function and a comment

* doc: some function/vars/const/package level updates

Various update that stood out while reading godoc.org for CoreDNS.

* Fix some misspellings as well

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

This fix updates golang.org/x/net to release-branch.go1.10
and golang.org/x/text to v0.3.0, for the purpose of
align with go version 1.10.

This fix also updates README.md to promote using go 1.10.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Use binary search to find the minimal message size, that contains whole
RRs and fits the client's buffer. This is better then just setting
entire sections to `nil`. Extend the tests to test for additional and
answer section truncation. In the first case we *don't* set the TC bit.

This function now also set Compression to true.

make -f Makefile.doc

Drop prominent placement of SkyDNS, some cleanups

Caddy 0.10.11 is released. Fix CoreDNS to compile against that version.
This also helps people compiling CoreDNS and go getting non-vendored
deps.

* go 1.10: update travis and gofmt

fmt now complains about on file tls_test.go, fix that. Also remove
gofmt, as goimports also checks, so this was done twice.

Put go 1.9 and 1.10 in travis for the time being.

* goimports optional

* Revert "pkg/typify: empty messages are OtherError (#1531)"

This reverts commit fc1d73ff.

* plugin/cache: add failsafeTTL

If we can not see what TTL we should put on a message to be cached, use
5 seconds as minimal TTL. We used to apply the maximum TTL to these
  messages.

* add noendpoints option

* go fmt

* add upstream

* docs

* tests

* move file, auto, secondary to new upstream

* include context in request

Messages with nothing in them are considered OtherError, they can not
serve any purpose for normal clients (i.e. dyn update or notifies might
have a use for them).

Also update a test in the cache plugin, so that we explicitaly test for
this case.