Comment 13 for bug 1558331

Confirming the bug here, I have the following on my server -

W: gpgv:/var/lib/apt/lists/download.virtualbox.org_virtualbox_debian_dists_vivid_InRelease: The repository is insufficiently signed by key 7B0FAB3A13B907435925D9C954422A4B98AB5139 (weak digest)
W: gpgv:/var/lib/apt/lists/ppa.launchpad.net_jpsutton_cockpit_ubuntu_dists_vivid_InRelease: The repository is insufficiently signed by key 7B6B809DC0F2DEF09DE284E6BB3BA55A3E4F2C0C (weak digest)
W: gpgv:/var/lib/apt/lists/ppa.launchpad.net_webupd8team_java_ubuntu_dists_xenial_InRelease: The repository is insufficiently signed by key 7B2C3B0889BF5709A105D03AC2518248EEA14886 (weak digest)
W: gpgv:/var/lib/apt/lists/webmin.mirror.somersettechsolutions.co.uk_repository_dists_sarge_Release.gpg: The repository is insufficiently signed by key 1719003ACE3E5A41E2DE70DFD97A3AE911F63C51 (weak digest)
W: gpgv:/var/lib/apt/lists/pkg.jenkins-ci.org_debian_binary_Release.gpg: The repository is insufficiently signed by key 150FDE3F7787E7D11EF4E12A9B7D32F2D50582E6 (weak digest)
W: gpgv:/var/lib/apt/lists/download.webmin.com_download_repository_dists_sarge_Release.gpg: The repository is insufficiently signed by key 1719003ACE3E5A41E2DE70DFD97A3AE911F63C51 (weak digest)