security/snortsam: broken on FreeBSD 15, deprecate

This port requires the obsolete ioctl(DIOCGETSTATUS), which is no
longer supported on FreeBSD 15. Upstream is dead, so deprecate.
It also has some questionable warnings.

See also: D41651
MFH: 2026Q1

(cherry picked from commit f41b42de2ab80efc26527aaf6aff7345d6583817)