net/samba419: "samba-tool domain backup offline" hangs
PR: 250906
Tested by: ml@netfence.it
Approved by: otis (mentor), kiwi, vvd, allanjude
MFH: 2025Q1
Differential Revision: https://reviews.freebsd.org/D49044
(cherry picked from commit 1db23ed5ef53c509dd421db6ded1c2f528916361)