Check if RTC is disabled only in virtualized environments.
On a real PC, bits 0-5 may be used for the date alarm function,
causing RTC failure to attach and
a "WARNING: no TOD clock present" warning in the boot log.
Verified no regression on QEMU/MICROVM by imil@
PR kern/60672
Remove the global __do_color_init, this is now obsolete. It was used
to force the terminal to be updated with the default colours because
the older colour code could not distinguish between default colours and
no colours. Now this is fixed so the forcing is no longer required.
sysctl.7: add various networking-related nodes
There are probably more to add (certainly across all the top-level node
categories), but these cover (or are related to) a few that frequently
get mentioned in performance tuning blog posts and emails.
(Confusingly, some lists are alphabetical and others aren't. I added the
TCP autosizing entries where they seemed to logically go.)
tcp_usrreq.c: minor sysctl description updates
TCP buffer autosizing can't really be deemed "experimental" since it was
enabled by default in early 2010.