Fix typos in man pages under /share/man

Found using: devel/py-proselint

share: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl

share: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

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Remove $FreeBSD$: one-line nroff pattern

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

inpcb: retire suppresion of randomization of ephemeral ports

The suppresion was added in 5f311da2ccb with no explanation in the
commit message of the exact problem that was fixed. In the BSDCan
2006

inpcb: retire suppresion of randomization of ephemeral ports

The suppresion was added in 5f311da2ccb with no explanation in the
commit message of the exact problem that was fixed. In the BSDCan
2006 talk [1], slides 12 to 14, we can find that it seems that there
was some problem with the TIME_WAIT state not properly being handled
on the remote side (also FreeBSD!), and this switching off the
suppression had hidden the problem. The rationale of the change was
that other stacks may also be buggy wrt the TIME_WAIT.

I did not find the actual problem in TIME_WAIT that the suppression
has hidden, neither a commit that would fix it. However, since that
time we started to handle SYNs with RFC5961 instead of RFC793, see
3220a2121cc. We also now have the tcp-testsuite [2], that has full
coverage of all possible scenarios of receiving SYN in TIME_WAIT.

This effectively reverts 5f311da2ccb6c216b79049172be840af4778129a
and 6ee79c59d2c081f837a11cc78908be54a6dbe09d.

[1] https://www.bsdcan.org/2006/papers/ImprovingTCPIP.pdf
[2] https://github.com/freebsd-net/tcp-testsuite

Reviewed by: rscheff
Discussed with: rscheff, rrs, tuexen
Differential revision: https://reviews.freebsd.org/D37042

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tcp: Prevent setting of ECN bits with setsockopt()

setsockopt() grants full access to the deprecated
TOS byte. For TCP, mask out the ECN codepoint, so that
only the DSCP portion can be adjusted.

Re

tcp: Prevent setting of ECN bits with setsockopt()

setsockopt() grants full access to the deprecated
TOS byte. For TCP, mask out the ECN codepoint, so that
only the DSCP portion can be adjusted.

Reviewed By: tuexen, hselasky, #manpages, #transport, debdrup
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D34154

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ip(4): Mention IP_IPSEC_POLICY ip-level socket option

Text is literally taken from NetBSD ip(4).

Sponsored by: NVIDIA Networking
MFC after: 3 days

[skip ci] ip.4: fix typos

MFC after: 2 weeks

MFhead@r344527

Merge ^/head r344178 through r344512.

Support struct ip_mreqn as argument for IP_ADD_MEMBERSHIP. Legacy support
for struct ip_mreq remains in place.

The struct ip_mreqn is Linux extension to classic BSD multicast API. It
has extra field

Support struct ip_mreqn as argument for IP_ADD_MEMBERSHIP. Legacy support
for struct ip_mreq remains in place.

The struct ip_mreqn is Linux extension to classic BSD multicast API. It
has extra field allowing to specify the interface index explicitly. In
Linux it used as argument for IP_MULTICAST_IF and IP_ADD_MEMBERSHIP.
FreeBSD kernel also declares this structure and supports it as argument
to IP_MULTICAST_IF since r170613. So, we have structure declared but
not fully supported, this confused third party application configure
scripts.

Code handling IP_ADD_MEMBERSHIP was mixed together with code for
IP_ADD_SOURCE_MEMBERSHIP. Bringing legacy and new structure support
into the mess would made the "argument switcharoo" intolerable, so
code was separated into its own switch case clause.

MFC after: 3 months
Differential Revision: https://reviews.freebsd.org/D19276

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Merge ^/head r338026 through r338297, and resolve conflicts.

Document socket control message routines for ancillary data access (CMSG_DATA).

PR: 227777
Reviewed by: bcr, eadler
Approved by: mat (mentor), manpages (bcr)
Obtained from: OpenBSD
Differential Rev

Document socket control message routines for ancillary data access (CMSG_DATA).

PR: 227777
Reviewed by: bcr, eadler
Approved by: mat (mentor), manpages (bcr)
Obtained from: OpenBSD
Differential Revision: https://reviews.freebsd.org/D15215

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Merge ^/head r327169 through r327340.

Fix a few speelling errors

- man pages
- bin/sh

Reviewed by: jilles

The patch provides the same socket option as Linux IP_ORIGDSTADDR.
Unfortunately they will have different integer value due to Linux value being already assigned in FreeBSD.

The patch is similar to

The patch provides the same socket option as Linux IP_ORIGDSTADDR.
Unfortunately they will have different integer value due to Linux value being already assigned in FreeBSD.

The patch is similar to IP_RECVDSTADDR but also provides the destination port value to the application.

This allows/improves implementation of transparent proxies on UDP sockets due to having the whole information on forwarded packets.

Reviewed by: adrian, aw
Approved by: ae (mentor)
Sponsored by: rsync.net
Differential Revision: D9235

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Fix a bunch of "xref refers to *this* page" igor(1) warnings.

MFC after: 1 month

Merge sync of head

Reintegrate head: r274132-r277384

Sponsored by: The FreeBSD Foundation

Reintegrate head revisions r273096-r277147

Sponsored by: The FreeBSD Foundation

MFhead @ r276594

Merge ^/head r274961 through r276301.

Fix various mdoc issues.

Found with: mandoc -Tlint

Merge from head@274682

IFC @r271694

Sync to HEAD@r271160.