@steveits
Listing recommended Patches via the the System Patches package is a great enchantment.
Meanwhile I've rolled back to 2.5. The 2.6 enchantment, which I wanted to get from that Release (IP Fragmentation over IPsec) isn't working in my configuration. Probably I'll have to change the IPsec Filter Mode to "VTI only" to get this work. This means also, I'll have to migrate a bunch of Rules (~900) from the IPsec section to each VTI Interface and spend some thoughts on how I design rules for encrypted traffic between sites when a firewall has to do a transit role.
I've encountered another Issue with HAProxy on 2.6 - The process started to consume permanent 100% CPU Time (one core) randomly. After a restart of the service, all went back to normal, at least for a while. I didn't look further into this, maybe it has something to do with ocsp preload enabled on some front-ends.
For now I'm back on 2.5.x., all in all it's running more stable in my configuration, even if 2.6 has some great updates in the IPSec code what makes overall configuration more smooth and reduce boot time about 50%.