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, 11 insertions, 0 deletions

diff --git a/plugin/bind/bind.go b/plugin/bind/bind.go
new file mode 100644
index 000000000..bd3c32b51
--- /dev/null
+++ b/plugin/bind/bind.go
@@ -0,0 +1,11 @@
+// Package bind allows binding to a specific interface instead of bind to all of them.
+package bind
+
+import "github.com/mholt/caddy"
+
+func init() {
+	caddy.RegisterPlugin("bind", caddy.Plugin{
+		ServerType: "dns",
+		Action:     setupBind,
+	})
+}