Make CoreDNS a server type plugin for Caddy (#220)

* Make CoreDNS a server type plugin for Caddy

Remove code we don't need and port all middleware over. Fix all tests
and rework the documentation.

Also make `go generate` build a caddy binary which we then copy into
our directory. This means `go build`-builds remain working as-is.

And new etc instances in each etcd test for better isolation.
Fix more tests and rework test.Server with the newer support Caddy offers.

Fix Makefile to support new mode of operation.

1 files changed, 0 insertions, 57 deletions

diff --git a/core/https/crypto.go b/core/https/crypto.go
deleted file mode 100644
index 7971bda36..000000000
--- a/core/https/crypto.go
+++ /dev/null
@@ -1,57 +0,0 @@
-package https
-
-import (
-	"crypto"
-	"crypto/ecdsa"
-	"crypto/rsa"
-	"crypto/x509"
-	"encoding/pem"
-	"errors"
-	"io/ioutil"
-	"os"
-)
-
-// loadPrivateKey loads a PEM-encoded ECC/RSA private key from file.
-func loadPrivateKey(file string) (crypto.PrivateKey, error) {
-	keyBytes, err := ioutil.ReadFile(file)
-	if err != nil {
-		return nil, err
-	}
-	keyBlock, _ := pem.Decode(keyBytes)
-
-	switch keyBlock.Type {
-	case "RSA PRIVATE KEY":
-		return x509.ParsePKCS1PrivateKey(keyBlock.Bytes)
-	case "EC PRIVATE KEY":
-		return x509.ParseECPrivateKey(keyBlock.Bytes)
-	}
-
-	return nil, errors.New("unknown private key type")
-}
-
-// savePrivateKey saves a PEM-encoded ECC/RSA private key to file.
-func savePrivateKey(key crypto.PrivateKey, file string) error {
-	var pemType string
-	var keyBytes []byte
-	switch key := key.(type) {
-	case *ecdsa.PrivateKey:
-		var err error
-		pemType = "EC"
-		keyBytes, err = x509.MarshalECPrivateKey(key)
-		if err != nil {
-			return err
-		}
-	case *rsa.PrivateKey:
-		pemType = "RSA"
-		keyBytes = x509.MarshalPKCS1PrivateKey(key)
-	}
-
-	pemKey := pem.Block{Type: pemType + " PRIVATE KEY", Bytes: keyBytes}
-	keyOut, err := os.Create(file)
-	if err != nil {
-		return err
-	}
-	keyOut.Chmod(0600)
-	defer keyOut.Close()
-	return pem.Encode(keyOut, &pemKey)
-}