*postfix_exporter-0.1.2 (19 Nov 2019) 19 Nov 2019; +files/postfix_exporter.confd, +files/postfix_exporter.initd, +files/postfix_exporter.logrotated, +files/postfix_exporter.service, +metadata.xml, +postfix_exporter-0.1.2.ebuild: app-metrics/postfix_exporter: Add ebuild with systemd unit file.