Currently we purge any existing disconnected durable handle when any new open comes in.
This bug was referenced in samba master: 9e98cd5c7a180521026b0d73a330bdaf2c8af73a
This bug was referenced in samba v4-20-test: 11903eb47623e67e5552e329564ee20df6f4863c
This bug was referenced in samba v4-21-test: da144e3cf5c627f5da72adb8234bb28caef95ecf
This bug was referenced in samba v4-21-stable (Release samba-4.21.1): da144e3cf5c627f5da72adb8234bb28caef95ecf
This bug was referenced in samba v4-20-stable (Release samba-4.20.6): 11903eb47623e67e5552e329564ee20df6f4863c