security/sshguard: Backport upstream patch
To fix HOSTNAME field in syslog header handling.
PR: 298836
Approved by: Kevin Zheng <kevinz5000@gmail.com> (maintainer)
Approved by: osa, vvd (Mentors, implicit)
MFH: 2026Q3
(cherry picked from commit 15f83b9d89941e55ac06600250304bcd7b00db3a)