Startup notification (#250)

Stop the caddy message and start our own init notifications.
Log the version of CoreDNS when starting up.
Fix all middleware's setup functions so that return the error prefixed
with *which* middleware was failing; leads to better debuggable errors
when starting up.

1 files changed, 3 insertions, 2 deletions

diff --git a/middleware/bind/setup.go b/middleware/bind/setup.go
index c08098b5d..1c40e8fda 100644
--- a/middleware/bind/setup.go
+++ b/middleware/bind/setup.go
@@ -5,6 +5,7 @@ import (
 	"net"
 
 	"github.com/miekg/coredns/core/dnsserver"
+	"github.com/miekg/coredns/middleware"
 
 	"github.com/mholt/caddy"
 )
@@ -13,11 +14,11 @@ func setupBind(c *caddy.Controller) error {
 	config := dnsserver.GetConfig(c)
 	for c.Next() {
 		if !c.Args(&config.ListenHost) {
-			return c.ArgErr()
+			return middleware.Error("bind", c.ArgErr())
 		}
 	}
 	if net.ParseIP(config.ListenHost) == nil {
-		return fmt.Errorf("not a valid IP address: %s", config.ListenHost)
+		return middleware.Error("bind", fmt.Errorf("not a valid IP address: %s", config.ListenHost))
 	}
 	return nil
 }