Merge pull request #16 from PowerDNS/git-short-hash-prefix

short git hashes are a prefix, not a suffix

httplistener/templates.go

 	if len(sha) < 8 {
 		return ""
 	}
-	return sha[len(sha)-7:]
+	return sha[:8]
 }
 
 // Colour helper functions to try and declutter