* 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.

* add namespace watch

* start ns watch, and add sync check

* plugin/forward: on demand healtchecking

Only start doing health checks when we encouner an error (any error).
This uses the new pluing/pkg/up package to abstract away the actual
checking. This reduces the LOC quite a bit; does need more testing, unit
testing and tcpdumping a bit.

* fix tests

* Fix readme

* Use pkg/up for healthchecks

* remove unused channel

* more cleanups

* update readme

* * Again do go generate and go build; still referencing the wrong forward
  repo? Anyway fixed.
* Use pkg/up for doing the healtchecks to cut back on unwanted queries
  * Change up.Func to return an error instead of a boolean.
  * Drop the string target argument as it doesn't make sense.
* Add healthcheck test on failing to get an upstream answer.

TODO(miek): double check Forward and Lookup and how they interact with
HC, and if we correctly call close() on those

* actual test

* Tests here

* more tests

* try getting rid of host

* Get rid of the host indirection

* Finish removing hosts

* moar testing

* import fmt

* field is not used

* docs

* move some stuff

* bring back health_check

* maxfails=0 test

* git and merging, bah

* review

* add upstream @self and loop count

* 1st round of feedback

* allow argless upstream

* update test

* readmes

* feedback

* prevent nil pointer when query frpc client that could not open

* add UT checking we can now safely request DNS query on an invalid hostname, query for gRPC connection

* fix ortograph

* fix format

* fix package declaration, fix UT - grpclogger, use fatalf, build pool with known addresses

* type, useless error check - after review

* Extend bind to allow multiple addresses. UTs added. Changes the log for server starting, adding address when available

* update readme for bind

* fixes after review

* minor fix on readme

* accept multiple BIND directives in blocserver, consolidate the addresses

* fixes after review - format logging server address, variable names

This fix enables goimports check and fixes several imports format
so that the import sections are prettier, e.g.:
```
 import (
-       "github.com/miekg/dns"
        "regexp"
        "strconv"
        "strings"
+
+       "github.com/miekg/dns"
 )
```
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>