Remove dovecot variant as guix dovecot is fixed

Julien LepillerTue May 26 16:42:33+0200 2020

dc13b88

system-configuration/modules/services
namelast commitdate
mail.scmUpdate dkimproxy-out service to use guix packages and guile config wrapperWed Jul 31 09:49:23+0200 2019