Comment 4 for bug 1771524

Dropped (by dropping mail stack delivery):
 276a97d3 2.2.22-1ubuntu Add mail-stack-delivery package
 d95bbb9a * Use ssl key paths set up by Debian as default - adapt mail-stack-delivery default config - move old mail-stack-deliver
 086f95d2 - for the ssl transition to work we need to ensure dovecot-core is complete before upgrading mail-stack-delivery
 fcfab6ea d/mail-stack-delivery.postinst: add SSL_CERT/SSL_KEY detection to postconf
 746601a4 fix SSL_CERT/SSL_KEY detection
 8f8a7d17 - debian/99-mail-stack-delivery.conf: drop explicit ssl_cipher_list, recent upstream has sane defaults now
 1e33020a - d/mail-stack-delivery.postinst: stop modifying mandatory tls config, recent upstream has sane defaults now
 07c4a590 d/mail-stack-delivery.preinst: improve moving of old mail-stack-delivery conf (merge with '* Use ssl key paths set up by Debian
 49d2e29e d/mail-stack-delivery.postinst: fix minor shell programming issues
 3078196f d/mail-stack-delivery.postinst: postfix conf to follow key changes
 bf4f82fc fix dput lint warnings in regard to dependencies

Droped (now upstream)
 d9dcfdf4 debian/patches/CVE-2017-15132.patch
 b971a03e debian/patches/CVE-2017-15132-additional.patch
 b468f56c debian/patches/CVE-2017-14461/*.patch: upstream parsing fixes
 572b4ec8 debian/patches/CVE-2017-15130/*.patch: upstream config filtering fix

Dropped (transition no more needed >18.04)
  4 pick 614a88a3 handle conffile removal of /etc/init/dovecot.conf