containers-systemd-0.0+git20200324.5f4ae65-bp156.3.1

- use SLE15 compatible %service_del_postun

- Package service file for squid conainer

- Update to version 0.0+git20200324.5f4ae65:
  * Add timer to prune unnamed images

- Update to version 0.0+git20200219.a6acfd1:
  * Adjust for new nginx container image
  * Fix comment

- Update to version 0.0+git20200217.580c00f:
  * Add squid

- Update to version 0.0+git20200212.47b21c6:
  * Add haproxy

- Update to version 0.0+git20200124.e3c2408:
  * Fix network parameter for dhcp servers

- Update to version 0.0+git20200122.8276c03:
  * Add support for nginx container

- Use new macro to prevent restart on update

- Update to version 0.0+git20200116.87baa97:
  * Start container only after network, don't abort if pull fails

- Add mariadb files
- Update to version 0.0+git20191030.b2f919f:
  * Fix typo, mention which variable adjusts secrets path for mariadb
  * Add environment variables and files to initialize mariadb at first startup
  * Enhance documentation
  * Add first mariadb service and sysconfig file
  * Mention dhcp6-server

- Update to version 0.0+git20191029.39ca697:
  * Provide dhcpd4 and dhcpd6 service files

- Update to version 0.0+git20191028.2cbfdca:
  * Add sysconfig and service file for dhcp-server container image

- Update to version 0.0+git20191026.e3a4918:
  * Add service and sysconfig file for bind container