Update os config for newer Guix

Julien LepillerSun Mar 31 20:59:12+0200 2019

7073d0b

system-configuration/systems
namelast commitdate
ene.scmAdd php-fpm to eneSun Mar 31 20:59:12+0200 2019
hermes.scmParameterize smtpd serviceMon Mar 25 22:36:37+0100 2019
tachikoma.scmFix tachikomaSat Mar 23 16:02:09+0100 2019