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, 117 deletions

diff --git a/middleware/erratic/setup.go b/middleware/erratic/setup.go
deleted file mode 100644
index 98db02247..000000000
--- a/middleware/erratic/setup.go
+++ /dev/null
@@ -1,117 +0,0 @@
-package erratic
-
-import (
-	"fmt"
-	"strconv"
-	"time"
-
-	"github.com/coredns/coredns/core/dnsserver"
-	"github.com/coredns/coredns/middleware"
-
-	"github.com/mholt/caddy"
-)
-
-func init() {
-	caddy.RegisterPlugin("erratic", caddy.Plugin{
-		ServerType: "dns",
-		Action:     setupErratic,
-	})
-}
-
-func setupErratic(c *caddy.Controller) error {
-	e, err := parseErratic(c)
-	if err != nil {
-		return middleware.Error("erratic", err)
-	}
-
-	dnsserver.GetConfig(c).AddMiddleware(func(next middleware.Handler) middleware.Handler {
-		return e
-	})
-
-	return nil
-}
-
-func parseErratic(c *caddy.Controller) (*Erratic, error) {
-	e := &Erratic{drop: 2}
-	drop := false // true if we've seen the drop keyword
-
-	for c.Next() { // 'erratic'
-		for c.NextBlock() {
-			switch c.Val() {
-			case "drop":
-				args := c.RemainingArgs()
-				if len(args) > 1 {
-					return nil, c.ArgErr()
-				}
-
-				if len(args) == 0 {
-					continue
-				}
-
-				amount, err := strconv.ParseInt(args[0], 10, 32)
-				if err != nil {
-					return nil, err
-				}
-				if amount < 0 {
-					return nil, fmt.Errorf("illegal amount value given %q", args[0])
-				}
-				e.drop = uint64(amount)
-				drop = true
-			case "delay":
-				args := c.RemainingArgs()
-				if len(args) > 2 {
-					return nil, c.ArgErr()
-				}
-
-				// Defaults.
-				e.delay = 2
-				e.duration = 100 * time.Millisecond
-				if len(args) == 0 {
-					continue
-				}
-
-				amount, err := strconv.ParseInt(args[0], 10, 32)
-				if err != nil {
-					return nil, err
-				}
-				if amount < 0 {
-					return nil, fmt.Errorf("illegal amount value given %q", args[0])
-				}
-				e.delay = uint64(amount)
-
-				if len(args) > 1 {
-					duration, err := time.ParseDuration(args[1])
-					if err != nil {
-						return nil, err
-					}
-					e.duration = duration
-				}
-			case "truncate":
-				args := c.RemainingArgs()
-				if len(args) > 1 {
-					return nil, c.ArgErr()
-				}
-
-				if len(args) == 0 {
-					continue
-				}
-
-				amount, err := strconv.ParseInt(args[0], 10, 32)
-				if err != nil {
-					return nil, err
-				}
-				if amount < 0 {
-					return nil, fmt.Errorf("illegal amount value given %q", args[0])
-				}
-				e.truncate = uint64(amount)
-			default:
-				return nil, c.Errf("unknown property '%s'", c.Val())
-			}
-		}
-	}
-	if (e.delay > 0 || e.truncate > 0) && !drop { // delay is set, but we've haven't seen a drop keyword, remove default drop stuff
-		e.drop = 0
-	}
-
-	return e, nil
-}