middleware/httpproxy: add debug queries (#446)

* middleware/httproxy: implement debug queries

Not too useful at the moment, but o-o.debug queries are supported
and return the Comment from dns.google.com.

Note that this is not always set.

* improve documentation

* Testing cleanups

1 files changed, 0 insertions, 20 deletions

diff --git a/middleware/etcd/debug.go b/middleware/etcd/debug.go
deleted file mode 100644
index d2dd66830..000000000
--- a/middleware/etcd/debug.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package etcd
-
-import "strings"
-
-const debugName = "o-o.debug."
-
-// isDebug checks if name is a debugging name, i.e. starts with o-o.debug.
-// it return the empty string if it is not a debug message, otherwise it will return the
-// name with o-o.debug. stripped off. Must be called with name lowercased.
-func isDebug(name string) string {
-	if len(name) == len(debugName) {
-		return ""
-	}
-	name = strings.ToLower(name)
-	debug := strings.HasPrefix(name, debugName)
-	if !debug {
-		return ""
-	}
-	return name[len(debugName):]
-}