chisel: Use opt_libexec instead of libexec in caveats

Closes #30890.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
LibreSSL 2.0.2

Update to latest portable release.

Closes #30892.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
libressl: update 2.0.2 bottle.
Update to FreeImage 3.16.0