Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r303631:

Fix non-functional bsdinstall services dialog.

The most recent version of bsdinstall does not seem to respect any of
the checkboxes in the "Choose the services you would like to be started
at boot" dialog. None of the chosen services end up in the rc.conf file
that is installed onto the target system.

This is caused by the bsdinstall/scripts/hardening script, which
implements the new hardening options dialog. The script starts by
overwriting the previously written rc.conf.services file:

echo -n > $BSDINSTALL_TMPETC/rc.conf.services

which is obviously incorrect. It should clear out rc.conf.hardening
instead.

Approved by: re (kib)
Reviewed by: allanjude
PR: 211506
Differential Revision: https://reviews.freebsd.org/D7387

MFC r302897:

Add new System Hardening menu and options to bsdinstall.

This patch add new 'hardening' file responsible for new bsdinstall
'System Hardening' menu allowing users to set some sane and carefully
picked system security options (like random process id's, hiding
other users/groups processes and others).

All options are OFF by default in this patch due to POLA principle
with intention to turn change some of them to ON by default in future.

Reviewed by: adrian, allanjude, bdrewery, nwhitehorn
Approved by: re@, adrian, allanjude

Add new System Hardening menu and options to bsdinstall.

This patch add new 'hardening' file responsible for new bsdinstall
'System Hardening' menu allowing users to set some sane and carefully
picked system security options (like random process id's, hiding
other users/groups processes and others).

All options are OFF by default in this patch due to POLA principle
with intention to turn change some of them to ON by default in future.

Reviewed by: adrian, allanjude, bdrewery, nwhitehorn
Approved by: adrian, allanjude
MFC after: 7 days