linux: systemd portmaster.service change

[muerta]

What would you like to add or change?:

autodedection on installation if systemd-networkd or NetworkManager is enabled and started.
depending on dedection, change the /etc/systemd/system/portmaster.service file

Why do you and others need this?:

example: fedora doesn't use systemd-networkd (by default). portmaster.service has by default "After=systemd-networkd.service". so it would never autostart on system boot.
change to "After=NetworkManager.service" solves this problem.

example commands:

systemctl is-active systemd-networkd
systemctl is-enabled systemd-networkd

systemctl is-active NetworkManager
systemctl is-enabled NetworkManager

[github-actions]

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