security/chkrootkit: Update 0.58b => 0.59

Changelog:

• New checks: Process executed from memory
• New commands: nologin
• XZ Backdoor Bottkitty (UEFI Bootkit)
• Bug fixes

https://www.chkrootkit.org/#new

Remove local patches with support FreeBSD 9.

PR: 293520
Approved by: Lacey Powers <lacey.leanne@gmail.com> (maintainer)
MFH: 2026Q1

(cherry picked from commit 91316bf1e26c797b602a73872592abaed8b58a9b)