plugin/reload: enable (#1587)

Couldn't revert the original commit, just manually perform the needed
tweaks.

core/dnsserver/zdirectives.go

@@ -11,6 +11,7 @@ package dnsserver
 // care what plugin above them are doing.
 var Directives = []string{
 	"tls",
+	"reload",
 	"nsid",
 	"root",
 	"bind",

core/plugin/zplugin.go

@@ -28,6 +28,7 @@ import (
 	_ "github.com/coredns/coredns/plugin/nsid"
 	_ "github.com/coredns/coredns/plugin/pprof"
 	_ "github.com/coredns/coredns/plugin/proxy"
+	_ "github.com/coredns/coredns/plugin/reload"
 	_ "github.com/coredns/coredns/plugin/reverse"
 	_ "github.com/coredns/coredns/plugin/rewrite"
 	_ "github.com/coredns/coredns/plugin/root"

plugin.cfg

@@ -20,7 +20,7 @@
 # log:log
 
 tls:tls
-#reload:reload # enable by reverting #1511
+reload:reload
 nsid:nsid
 root:root
 bind:bind

plugin/reload/README.md

@@ -44,7 +44,7 @@ reload [INTERVAL] [JITTER]
 
 Check with the default intervals:
 
-~~~ txt
+~~~ corefile
 . {
     reload
     erratic
@@ -53,7 +53,7 @@ Check with the default intervals:
 
 Check every 10 seconds (jitter is automatically set to 10 / 2 = 5 in this case):
 
-~~~ txt
+~~~ corefile
 . {
     reload 10s
     erratic