[Bug 1988119] [NEW] Update to systemd 237-3ubuntu10.54 broke dns

[Pieter]

Public bug reported:

Two servers today that updated systemd to "systemd 237-3ubuntu10.54" 
https://ubuntu.com/security/notices/USN-5583-1

could not resolve dns anymore.
no dns servers, normally set through dhcp.

Ubuntu 18.04

Temp fix.
 1. Edit /etc/systemd/resolved.conf
 1. Add/Uncomment # FallbackDNS=168.63.129.16
 1. Restart systemd-resolved sudo systemctl restart systemd-resolved.service
 1. Confirm dns working with systemd-resolve google.com

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1988119

Title:
  Update to systemd 237-3ubuntu10.54 broke dns

Status in systemd package in Ubuntu:
  New

Bug description:
  Two servers today that updated systemd to "systemd 237-3ubuntu10.54" 
  https://ubuntu.com/security/notices/USN-5583-1

  could not resolve dns anymore.
  no dns servers, normally set through dhcp.

  Ubuntu 18.04

  Temp fix.
   1. Edit /etc/systemd/resolved.conf
   1. Add/Uncomment # FallbackDNS=168.63.129.16
   1. Restart systemd-resolved sudo systemctl restart systemd-resolved.service
   1. Confirm dns working with systemd-resolve google.com

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