"PPPoE clients" placeholder wrong in firewall rules, floating rules on PPPoE creates broken ruleset
Couple issues with firewall rules and PPPoE server.
1) the "PPPoE Clients" network wrongly fills in the server IP.
2) If choosing the "PPPoE server" interface in floating rules, it omits the interface from the resulting rule, creating an invalid ruleset.
PR 3032 merged, confirmed to fix both.