Electronic signature
The pdfs are signed with the pdfsig tool (poppler) with an nss certificate.
To activate it you have to generate an nss certificate and install 2 packages, the procedure is described here: https://github.com/24eme/signaturepdf/blob/master/README.md#enabling-digital-signature
The electronic signature is not currently activated in the multiple signature mode.
Full Changelog: v1.5.1...v1.7.0