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, 28 deletions

diff --git a/middleware/debug/debug.go b/middleware/debug/debug.go
deleted file mode 100644
index f92a27554..000000000
--- a/middleware/debug/debug.go
+++ /dev/null
@@ -1,28 +0,0 @@
-package debug
-
-import (
-	"github.com/coredns/coredns/core/dnsserver"
-	"github.com/coredns/coredns/middleware"
-
-	"github.com/mholt/caddy"
-)
-
-func init() {
-	caddy.RegisterPlugin("debug", 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("debug", c.ArgErr())
-		}
-		config.Debug = true
-	}
-
-	return nil
-}