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

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

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

Use less ugly code to allocate buffer of SORCVBUF_SIZE.

flowctl: Replace alloca() with an array.

Reviewed by: glebius

Add "human" option to print IPv4/IPv6 flows in human-readable format.
Show IPv4/IPv6 header IFF there are some flows following.
Wrap some long lines.

Sponsored by Yandex LLC

Reviewed by: glebius (previous version)
Approved by: ae(mentor)
MFC after: 1 week

Conditionally compile in the IPv4/IPv6 address family support.
Test it with feature_present(3), so that we do not end up with passing
an unsupported version to NgSendMsg(3).

Approved by: glebius

Rewrite the flowctl utility to add it support for displaying
both IPv4 and IPv4 flows.

Get the other NG_PATHLEN while I'm here too :(.

Use NG_PATHSIZ instead of NG_PATHLEN + 1.

Implement "verbose" optional keyword for "show" command. This is analog
of Cisco's "show ip cache verbose flow" command.

Remove code, inherited from ipacctctl, which sets socket to non-blocking
mode, since this introduces problems on SMP.

Remove redundant parameter inherited from ipacctctl.

- Remove advertising clause from copyright [1]
- Change my email to glebius@FreeBSD.org

Requested by: ru [1]

Userland control utility for ng_netflow.

Approved by: julian (mentor)