add cleanup script for certs

scripts/certs/clean-all.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+cd "$DIR"
+
+rm -f ca.{key,crt}
+rm -f server/server.{crt,key,pem,p12,csr}
+rm -f client/client.{crt,key,pem,p12,csr}