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, 32 deletions

diff --git a/middleware/file/include_test.go b/middleware/file/include_test.go
deleted file mode 100644
index f07a02e03..000000000
--- a/middleware/file/include_test.go
+++ /dev/null
@@ -1,32 +0,0 @@
-package file
-
-import (
-	"strings"
-	"testing"
-
-	"github.com/coredns/coredns/middleware/test"
-)
-
-// Make sure the external miekg/dns dependency is up to date
-
-func TestInclude(t *testing.T) {
-
-	name, rm, err := test.TempFile(".", "foo\tIN\tA\t127.0.0.1\n")
-	if err != nil {
-		t.Fatalf("Unable to create tmpfile %q: %s", name, err)
-	}
-	defer rm()
-
-	zone := `$ORIGIN example.org.
-@ IN SOA sns.dns.icann.org. noc.dns.icann.org. 2017042766 7200 3600 1209600 3600
-$INCLUDE ` + name + "\n"
-
-	z, err := Parse(strings.NewReader(zone), "example.org.", "test", 0)
-	if err != nil {
-		t.Errorf("Unable to parse zone %q: %s", "example.org.", err)
-	}
-
-	if _, ok := z.Search("foo.example.org."); !ok {
-		t.Errorf("Failed to find %q in parsed zone", "foo.example.org.")
-	}
-}