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, 42 deletions

diff --git a/middleware/metrics/setup_test.go b/middleware/metrics/setup_test.go
deleted file mode 100644
index 73555427e..000000000
--- a/middleware/metrics/setup_test.go
+++ /dev/null
@@ -1,42 +0,0 @@
-package metrics
-
-import (
-	"testing"
-
-	"github.com/mholt/caddy"
-)
-
-func TestPrometheusParse(t *testing.T) {
-	tests := []struct {
-		input     string
-		shouldErr bool
-		addr      string
-	}{
-		// oks
-		{`prometheus`, false, "localhost:9153"},
-		{`prometheus localhost:53`, false, "localhost:53"},
-		// fails
-		{`prometheus {}`, true, ""},
-		{`prometheus /foo`, true, ""},
-		{`prometheus a b c`, true, ""},
-	}
-	for i, test := range tests {
-		c := caddy.NewTestController("dns", test.input)
-		m, err := prometheusParse(c)
-		if test.shouldErr && err == nil {
-			t.Errorf("Test %v: Expected error but found nil", i)
-			continue
-		} else if !test.shouldErr && err != nil {
-			t.Errorf("Test %v: Expected no error but found error: %v", i, err)
-			continue
-		}
-
-		if test.shouldErr {
-			continue
-		}
-
-		if test.addr != m.Addr {
-			t.Errorf("Test %v: Expected address %s but found: %s", i, test.addr, m.Addr)
-		}
-	}
-}