socket.9: Catch up with commit cfb1e92912b4c

Fixes: cfb1e92912b4 ("sockets: don't malloc/free sockaddr memory on accept(2)")
Reported by: Mina Galić <freebsd@igalic.co>

Remove $FreeBSD$: two-line nroff pattern

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

ithread(9): update functions to current day

The public KPI is now intr_event_**,
- Convert existing documented functions to their equivalents.
- Fix up the function arguments
- Fix up the possibl

ithread(9): update functions to current day

The public KPI is now intr_event_**,
- Convert existing documented functions to their equivalents.
- Fix up the function arguments
- Fix up the possible error return values for each
- Remove ithread_schedule() completely
- Rename man page to intr_event(9)
- Update cross-references

Future changes will update the descriptive text for these functions.

PR: 100803
Based on work by: trhodes
Reviewed by: jhb
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D33475

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socket(9): Remove duplicate word 'is is'

MFC after: 1 week

man(9): Some markup fixes

- whitespace at end of input line
- skipping paragraph macro: Pp after Sh

MFC after: 3 days

Merge ^/head r339015 through r339669.

r334853 added a "socket destructor" callback. However, as implemented, it
was really a "socket close" callback.

Update the socket destructor functionality to run when a socket is
destroyed (rather t

r334853 added a "socket destructor" callback. However, as implemented, it
was really a "socket close" callback.

Update the socket destructor functionality to run when a socket is
destroyed (rather than when it is closed). The original submitter has
confirmed that this change satisfies the intended use case.

Suggested by: rwatson
Submitted by: Michio Honda <micchie at sfc.wide.ad.jp>
Tested by: Michio Honda <micchie at sfc.wide.ad.jp>
Approved by: re (kib)
Differential Revision: https://reviews.freebsd.org/D17590

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Add a socket destructor callback. This allows kernel providers to set
callbacks to perform additional cleanup actions at the time a socket is
closed.

Michio Honda presented a use for this at BSDCan

Add a socket destructor callback. This allows kernel providers to set
callbacks to perform additional cleanup actions at the time a socket is
closed.

Michio Honda presented a use for this at BSDCan 2018.
(See https://www.bsdcan.org/2018/schedule/events/965.en.html .)

Submitted by: Michio Honda <micchie at sfc.wide.ad.jp> (previous version)
Reviewed by: lstewart (previous version)
Differential Revision: https://reviews.freebsd.org/D15706

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IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28

Sync to HEAD@r269943.

Fix markups.

Document some more socket features

Add some mention of the functions used by protocol implementations,
upcalls, and other general routines.

Not all functionality is documented; in particular:
o the

Document some more socket features

Add some mention of the functions used by protocol implementations,
upcalls, and other general routines.

Not all functionality is documented; in particular:
o the *at() variants, which are useful only for implementing the
corresponding syscalls.
o soconnect2(), also only used to implement a syscall (socketpair()).
o sockargs(), which is essentually unused and only tangentially
socket-related.
o selsocket(), which is commented as being present solely for use by
netncp and netsmb.
o getsockaddr(), which is just a convenience shortcut for copyin().

Reviewed by: jhb (previous version)
Approved by: hrs (mentor)

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IFC @ r254014

IFC @253398

Merge fresh head.

sync from head

Fix usage for soreceive(9) - uio must always be non-NULL.

MFC after: 1 week

Reference socket(9) from ng_ksocket(4). Reference ng_ksocket(4),
ithread(9), msleep(9), ucred(9) from socket(9).

Partly suggested by: julian

Add a basic man page for the socket(9) kernel programming interface used
by the NFS client and server, netsmb, netncp, etc.

Reviewed by: ru
Fixed by: ru

Reference socket(9) from ng_ksocket(4). Reference ng_ksocket(4),
ithread(9), msleep(9), ucred(9) from socket(9).

Partly suggested by: julian

Add a basic man page for the socket(9) kernel programming interface used
by the NFS client and server, netsmb, netncp, etc.

Reviewed by: ru
Fixed by: ru