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, 32 deletions

diff --git a/core/setup/root.go b/core/setup/root.go
deleted file mode 100644
index 0fce5f170..000000000
--- a/core/setup/root.go
+++ /dev/null
@@ -1,32 +0,0 @@
-package setup
-
-import (
-	"log"
-	"os"
-
-	"github.com/miekg/coredns/middleware"
-)
-
-// Root sets up the root file path of the server.
-func Root(c *Controller) (middleware.Middleware, error) {
-	for c.Next() {
-		if !c.NextArg() {
-			return nil, c.ArgErr()
-		}
-		c.Root = c.Val()
-	}
-
-	// Check if root path exists
-	_, err := os.Stat(c.Root)
-	if err != nil {
-		if os.IsNotExist(err) {
-			// Allow this, because the folder might appear later.
-			// But make sure the user knows!
-			log.Printf("[WARNING] Root path does not exist: %s", c.Root)
-		} else {
-			return nil, c.Errf("Unable to access root path '%s': %v", c.Root, err)
-		}
-	}
-
-	return nil, nil
-}