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, 88 deletions

diff --git a/middleware/hosts/setup.go b/middleware/hosts/setup.go
deleted file mode 100644
index 38458541c..000000000
--- a/middleware/hosts/setup.go
+++ /dev/null
@@ -1,88 +0,0 @@
-package hosts
-
-import (
-	"log"
-	"os"
-	"path"
-
-	"github.com/coredns/coredns/core/dnsserver"
-	"github.com/coredns/coredns/middleware"
-
-	"github.com/mholt/caddy"
-)
-
-func init() {
-	caddy.RegisterPlugin("hosts", caddy.Plugin{
-		ServerType: "dns",
-		Action:     setup,
-	})
-}
-
-func setup(c *caddy.Controller) error {
-	h, err := hostsParse(c)
-	if err != nil {
-		return middleware.Error("hosts", err)
-	}
-
-	dnsserver.GetConfig(c).AddMiddleware(func(next middleware.Handler) middleware.Handler {
-		h.Next = next
-		return h
-	})
-
-	return nil
-}
-
-func hostsParse(c *caddy.Controller) (Hosts, error) {
-	var h = Hosts{
-		Hostsfile: &Hostsfile{path: "/etc/hosts"},
-	}
-	defer h.ReadHosts()
-
-	config := dnsserver.GetConfig(c)
-
-	for c.Next() {
-		args := c.RemainingArgs()
-		if len(args) >= 1 {
-			h.path = args[0]
-			args = args[1:]
-
-			if !path.IsAbs(h.path) && config.Root != "" {
-				h.path = path.Join(config.Root, h.path)
-			}
-			_, err := os.Stat(h.path)
-			if err != nil {
-				if os.IsNotExist(err) {
-					log.Printf("[WARNING] File does not exist: %s", h.path)
-				} else {
-					return h, c.Errf("unable to access hosts file '%s': %v", h.path, err)
-				}
-			}
-		}
-
-		origins := make([]string, len(c.ServerBlockKeys))
-		copy(origins, c.ServerBlockKeys)
-		if len(args) > 0 {
-			origins = args
-		}
-
-		for i := range origins {
-			origins[i] = middleware.Host(origins[i]).Normalize()
-		}
-		h.Origins = origins
-
-		for c.NextBlock() {
-			switch c.Val() {
-			case "fallthrough":
-				args := c.RemainingArgs()
-				if len(args) == 0 {
-					h.Fallthrough = true
-					continue
-				}
-				return h, c.ArgErr()
-			default:
-				return h, c.Errf("unknown property '%s'", c.Val())
-			}
-		}
-	}
-	return h, nil
-}