also allow SECoP client connections via serial Change-Id: I10c02532a9f8e9b8f16599b98c439742da6d8f5c Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/22525 Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de> Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>