Znuny release 6.5.19 and 7.3.1

[Johannes]

Hello Community,

the time has come, Release 6.5.19 and 7.3.1. are finally here.

https://www.znuny.org/en/releases/znuny-lts-6-5-19
https://www.znuny.org/en/releases/znuny-7-3-1

Important: Both are security releases. Please update your instances.

As always, looking forward to any feedback you may have - here and via GitHub.

Regards
Johannes