Disable tracing on FreeBSD using procctl. (OpenSSH Portable 8.8)

[mike tancsa]

Hi,

     With the commit below, OpenSSH portable 8.8 doesnt seem to work 
with sftp on FreeBSD with RELENG_12 and RELENG_13.  sftp errors out with

sftp-server[89445]: fatal: unable to make the process untraceable

commit 2d678c5e3bdc2f5c99f7af5122e9d054925d560d
Author: David Carlier <devnexen at gmail.com>
Date:   Wed Sep 8 19:49:54 2021 +0100

     Disable tracing on FreeBSD using procctl.

     Placed at the start of platform_disable_tracing() to prevent 
declaration
     after code errors from strict C89 compilers (in the unlikely event that
     more than one method is enabled).

I opened a PR with the port maintainer

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259174

     ---Mike