Remove the word middleware (#1067)

* Rename middleware to plugin

first pass; mostly used 'sed', few spots where I manually changed
text.

This still builds a coredns binary.

* fmt error

* Rename AddMiddleware to AddPlugin

* Readd AddMiddleware to remain backwards compat

1 files changed, 0 insertions, 43 deletions

diff --git a/middleware/root/root.go b/middleware/root/root.go
deleted file mode 100644
index d03ecb8a4..000000000
--- a/middleware/root/root.go
+++ /dev/null
@@ -1,43 +0,0 @@
-package root
-
-import (
-	"log"
-	"os"
-
-	"github.com/coredns/coredns/core/dnsserver"
-	"github.com/coredns/coredns/middleware"
-
-	"github.com/mholt/caddy"
-)
-
-func init() {
-	caddy.RegisterPlugin("root", caddy.Plugin{
-		ServerType: "dns",
-		Action:     setup,
-	})
-}
-
-func setup(c *caddy.Controller) error {
-	config := dnsserver.GetConfig(c)
-
-	for c.Next() {
-		if !c.NextArg() {
-			return middleware.Error("root", c.ArgErr())
-		}
-		config.Root = c.Val()
-	}
-
-	// Check if root path exists
-	_, err := os.Stat(config.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", config.Root)
-		} else {
-			return middleware.Error("root", c.Errf("unable to access root path '%s': %v", config.Root, err))
-		}
-	}
-
-	return nil
-}