Changelog for chatmail deployment

untagged

check that OpenPGP has only PKESK, SKESK and SEIPD packets (#323, #324)
improve filtermail checks for encrypted messages and drop support for unencrypted MDNs (#320)

don't check necessary DNS records on cmdeploy init anymore (#316)
ensure cron and acl are installed (#293, #310)
change default for delete_mails_after from 40 to 20 days (#300)
save journald logs only to memory and save nginx logs to journald instead of file (#299)
fix writing of multiple obs repositories in /etc/apt/sources.list (#290)
metadata: add support for /shared/vendor/deltachat/irohrelay (#284)
Emit "XCHATMAIL" capability from IMAP server (#278)
Move echobot into /var/lib/echobot (#281)
Accept Let's Encrypt's new Terms of Services (#275)
Reload Dovecot and Postfix when TLS certificate updates (#271)
Use forked version of dovecot without hardcoded delays (#270)

Install dig on the server to resolve DNS records (#267)
preserve notification order and exponentially backoff with retries for tokens where we didn't get a successful return (#265)
Run chatmail-metadata and doveauth as vmail (#261)
Apply systemd restrictions to echobot (#259)
re-enable running the CI in pull requests, but not concurrently (#258)

Move systemd unit templates to cmdeploy package (#255)
Persist push tokens and support multiple device per address (#254)
Avoid warning for regular doveauth protocol's hello message. (#250)
Fix various tests to pass again with "cmdeploy test". (#245, #242
Ensure lets-encrypt certificates are reloaded after renewal ([#244]) deltachat#244
Persist tokens to avoid iOS users loosing push-notifications when the chatmail metadata service is restarted (happens regularly during deploys) (#238
Fix failing sieve-script compile errors on incoming messages (#237
Fix quota reporting after expunging of old mails (#233