Hi,

for the records...

5.1 has gone stable:

=> http://www.squid-cache.org/Versions/

Excerpt from changelog:
"Changes in squid-5.1 (01 Aug 2021):

	- Bug 4696: Fix leaky String move assignment operator
	- Fix ACL-related reconfiguration memory leak
	- Fix SSL-Bump reconfiguration leaking public key memory
	- Fix build on RISC-V
	- Fix build on Ubuntu 21.04

Changes in squid-5.0.7 (04 Jul 2021):

	- Fix a helper logging issues
	- Fix some helper connection issues
	- Cleanup: remove much unused code
	- ... and all fixes from 4.16
..."

I'm at it.

Best,
Matthias