Remove old stuff from caddy and some go vet changes (#227)

middleware/middleware.go

@@ -2,8 +2,6 @@
 package middleware
 
 import (
-	"time"
-
 	"github.com/miekg/dns"
 	"golang.org/x/net/context"
 )
@@ -55,61 +53,3 @@ func (f HandlerFunc) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.
 }
 
 const Namespace = "coredns"
-
-// IndexFile looks for a file in /root/fpath/indexFile for each string
-// in indexFiles. If an index file is found, it returns the root-relative
-// path to the file and true. If no index file is found, empty string
-// and false is returned. fpath must end in a forward slash '/'
-// otherwise no index files will be tried (directory paths must end
-// in a forward slash according to HTTP).
-//
-// All paths passed into and returned from this function use '/' as the
-// path separator, just like URLs.  IndexFle handles path manipulation
-// internally for systems that use different path separators.
-/*
-func IndexFile(root http.FileSystem, fpath string, indexFiles []string) (string, bool) {
-	if fpath[len(fpath)-1] != '/' || root == nil {
-		return "", false
-	}
-	for _, indexFile := range indexFiles {
-		// func (http.FileSystem).Open wants all paths separated by "/",
-		// regardless of operating system convention, so use
-		// path.Join instead of filepath.Join
-		fp := path.Join(fpath, indexFile)
-		f, err := root.Open(fp)
-		if err == nil {
-			f.Close()
-			return fp, true
-		}
-	}
-	return "", false
-}
-
-// SetLastModifiedHeader checks if the provided modTime is valid and if it is sets it
-// as a Last-Modified header to the ResponseWriter. If the modTime is in the future
-// the current time is used instead.
-func SetLastModifiedHeader(w http.ResponseWriter, modTime time.Time) {
-	if modTime.IsZero() || modTime.Equal(time.Unix(0, 0)) {
-		// the time does not appear to be valid. Don't put it in the response
-		return
-	}
-
-	// RFC 2616 - Section 14.29 - Last-Modified:
-	// An origin server MUST NOT send a Last-Modified date which is later than the
-	// server's time of message origination. In such cases, where the resource's last
-	// modification would indicate some time in the future, the server MUST replace
-	// that date with the message origination date.
-	now := currentTime()
-	if modTime.After(now) {
-		modTime = now
-	}
-
-	w.Header().Set("Last-Modified", modTime.UTC().Format(http.TimeFormat))
-}
-*/
-
-// currentTime, as it is defined here, returns time.Now().
-// It's defined as a variable for mocking time in tests.
-var currentTime = func() time.Time {
-	return time.Now()
-}