RFC reviews for ggate and hastd

From: Johannes Totz via freebsd-geom <freebsd-geom_at_FreeBSD.org>
Date: Thu, 02 Sep 2021 20:55:29 UTC
(looks like gmane swallowed my 1st message, trying again)

Hey folks,

any ggate or hastd users here? I've got some code reviews for you. 
Please take a look if you get a chance:

Fix potential out-of-bounds read in the geom-gate kernel module.

Dynamically alloc buffers in ggatec, instead of assuming a fixed size on 
the stack.

Simple rc script to start ggated.