Merge pull request #577 in ZP/z-push from bugfix/ZP-1273-missing-warnings-for-autodiscover to develop

* commit 'b52c9d9c':
  ZP-1273 Fixed review comment. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-1273 Limit amount read from input stream and move check on reponse schema. Released under the Affero GNU General Public License (AGPL) version 3.
  ZP-1273 Bugfix missing warnings for autodiscover. Released under the Affero GNU General Public License (AGPL) version 3.