New features:
[proxy] add timeout managing socket control
Improvements:
[system] avoid cerbot command listing LetsEncrypt certificates
[system] add PPID column in supportsave ps info
[stats] disable session information when they are not needed
[cluster] improve performance in sessions replication
Bugfixes:
[farms] fixed backend IP changed when a DHCP modification is performed
[farms] fixed HTTP farm migration script
[farms] fixed l4xnat virtual port changed to multiport when setting protocol to SIP
[farms] l4xnat: fixed scheduler symhash with only one backend available
[webgui] fixed certificate expiration time message