Move *proxy* to external (#2651)

* Move *proxy* to external

move the proxy plugin into coredns/proxy and remove it as a default
plugin. Link the proxy to deprecated in plugin.cfg

coredns/proxy doesn't compile because of the vendoring :(

Signed-off-by: Miek Gieben <miek@miek.nl>

* Add github.com/coredns/proxy

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

1 files changed, 0 insertions, 53 deletions

diff --git a/plugin/proxy/setup.go b/plugin/proxy/setup.go
deleted file mode 100644
index 2f3d7dd62..000000000
--- a/plugin/proxy/setup.go
+++ /dev/null
@@ -1,53 +0,0 @@
-package proxy
-
-import (
-	"github.com/coredns/coredns/core/dnsserver"
-	"github.com/coredns/coredns/plugin"
-	"github.com/coredns/coredns/plugin/metrics"
-	clog "github.com/coredns/coredns/plugin/pkg/log"
-
-	"github.com/mholt/caddy"
-)
-
-var log = clog.NewWithPlugin("proxy")
-
-func init() {
-	caddy.RegisterPlugin("proxy", caddy.Plugin{
-		ServerType: "dns",
-		Action:     setup,
-	})
-}
-
-func setup(c *caddy.Controller) error {
-	upstreams, err := NewStaticUpstreams(&c.Dispenser)
-	if err != nil {
-		return plugin.Error("proxy", err)
-	}
-
-	t := dnsserver.GetConfig(c).Handler("trace")
-	P := &Proxy{Trace: t}
-	dnsserver.GetConfig(c).AddPlugin(func(next plugin.Handler) plugin.Handler {
-		P.Next = next
-		P.Upstreams = &upstreams
-		return P
-	})
-
-	c.OnStartup(func() error {
-		metrics.MustRegister(c, RequestCount, RequestDuration)
-		return nil
-	})
-
-	for i := range upstreams {
-		u := upstreams[i]
-		c.OnStartup(func() error {
-			return u.Exchanger().OnStartup(P)
-		})
-		c.OnShutdown(func() error {
-			return u.Exchanger().OnShutdown(P)
-		})
-		// Register shutdown handlers.
-		c.OnShutdown(u.Stop)
-	}
-
-	return nil
-}