sys: Remove $FreeBSD$: one-line .h pattern

Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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net: clean up empty lines in .c and .h files

sys: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
pro

sys: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.

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Merge svn+ssh://svn.freebsd.org/base/head@219553

Add support for NetFlow version 9 into ng_netflow(4) node.

Submitted by: Alexander V. Chernikov <melifaro ipfw.ru>

o Replace disappeared URLs to Cisco docs by new ones, style.
No functional changes.

A new version of NetFlow node.

The most significant changes are:
- Use UMA zone instead of own chunk of memory.
- Lock each hash entry separately.
- Expire items "actively" - interrupt method can ex

A new version of NetFlow node.

The most significant changes are:
- Use UMA zone instead of own chunk of memory.
- Lock each hash entry separately.
- Expire items "actively" - interrupt method can expire flows
from hash slot, when it searches through it.
- Remove global tailqueue. Make callout thread search through
every hash slot.
- Export datagram is detached from private data and filled. If
it is incomplete, it is attached back. Another thread will
continue working with it.

Lesser, but also important speedups:
- Flows in hash slot are stored in tailqueue. Whenever a flow is
hit, it is moved to the begging, so it can be located quicker.
- When callout thread works with hash slot it bails out if
slot mutex is contested.

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

Requested by: ru [1]

A netgraph node implementing Netflow version 5.

Supported by: Bestcom ISP, Rinet ISP
Approved by: julian (mentor)

o Replace disappeared URLs to Cisco docs by new ones, style.
No functional changes.

A new version of NetFlow node.

The most significant changes are:
- Use UMA zone instead of own chunk of memory.
- Lock each hash entry separately.
- Expire items "actively" - interrupt method can ex

A new version of NetFlow node.

The most significant changes are:
- Use UMA zone instead of own chunk of memory.
- Lock each hash entry separately.
- Expire items "actively" - interrupt method can expire flows
from hash slot, when it searches through it.
- Remove global tailqueue. Make callout thread search through
every hash slot.
- Export datagram is detached from private data and filled. If
it is incomplete, it is attached back. Another thread will
continue working with it.

Lesser, but also important speedups:
- Flows in hash slot are stored in tailqueue. Whenever a flow is
hit, it is moved to the begging, so it can be located quicker.
- When callout thread works with hash slot it bails out if
slot mutex is contested.

show more ...

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

Requested by: ru [1]

A netgraph node implementing Netflow version 5.

Supported by: Bestcom ISP, Rinet ISP
Approved by: julian (mentor)