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

MFV r288243: nc from OpenBSD 5.8.

MFV r258194-264360: nc(1) from OpenBSD 5.5.

MFC after: 2 weeks

MFV: netcat from OpenBSD 5.4.

No functional change.

MFV r249496,249498. The most visible change is that we no longer shuts
down the connection when stdin closes, by default. This matches Hobbit's
original netcat and GNU netcat.

Old behavior can be restored with the new -N flag.

MFC after: 2 weeks

MFV: netcat from OpenBSD 5.2.

MFC after: 1 month

Merge from OpenBSD 5.1.

MFC after: 3 weeks

MFV: nc(1) from OpenBSD 4.9.

MFC after: 1 month
Obtained from: OpenBSD

MFV: nc(1) from OpenBSD 4.8.

While I'm there, bump WARNS level to 2 as the vendor
have the right printf format string now.

MFC after: 1 month
Obtained from: OpenBSD

Remove extra word, which looks like a left-over from a deleted sentence.

Use "printf" instead of "echo -n" in an example because it
should be more compatible for most shells that are out there.

I contacted Philip Guenther at OpenBSD about this PR and he
corrected the issue in their tree pretty fast.

PR: docs/142243
Submitted by: Yasir (yasir27 at mail dot ru)
Obtained from: OpenBSD
Discussed with: delphij
MFC after: 7 days

Diff reduction with OpenBSD:

- Remove unused locally added variable;
- Deprecate -o: it's the default behavior on OpenBSD.

X-MFC: along with nc 4.7.

MFV: Update nc to the version from OpenBSD 4.7.

MFC after: 1 month

Update to 4.6.

Note: the -V option from OpenBSD is implemented using setfib(2) on FreeBSD.

MFC after: 2 weeks

Fix .Dd value -- our mdoc macros don't know how to parse the $Mdocdate$
tag, so the file was being treated as having no date (i.e., the current
date was being inserted).

Approved by: re (kib)

Add an EXIT STATUS section to the manual page. Currently, nc(1)
does not follow sysexits(3), and returns 1 for all error cases.

PR: docs/126451

Update netcat to the version carried with OpenBSD 4.5.

Merge nc(1) from OpenBSD 4.4. While there, rename our '-O' (no
tcp options) to '--no-tcpopt' in order to resolve a comflicit
with OpenBSD's -O semantics.

Document freebsd extensions to netcat a bit better:
- sort the options
- document -o and -O everywhere

Reviewed by: delphij
Approved by: rwatson (mentor)

Resolve conflicts.

Add an -O option to disable TCP options, for protocol testing purposes.
Do this for active and passive (-l switch) TCP sessions.

MFC after: 1 week

Resolve conflicts.

Resolve conflicts.

Fix incorrect command line examples.

Submitted by: Yoshihiko Sarumaru (mistral at imasy dot or dot jp)
PR: docs/94158
MFC after: 2 days

Fix markup in local FreeBSD additions.

Approved by: re (blanket manpages)

Undo the VCS tag move to reduce diff hunks.

Pointed out by: ru

Finish the import of nc(1) from OpenBSD. This includes:
- Bring IPsec support from the ports collection [1].
- Bring -o ("once only") option from the ports
collection [2].
- Adopt the Makefile framework into
usr.bin/nc/Makefile.
- Add a knob to control whether to build nc(1),
NO_NETCAT.
- Bump __FreeBSD_version so ports collection can
detect this change.

Original patchset are contributed to the ports collection by:
[1] nectar, [2] joerg.

Note: WARNS?=6 patchset spined off in this commit, in order not
to take too many files off the vendor branch.

This commit was generated by cvs2svn to compensate for changes in r141261,
which included commits to RCS files with non-trunk default branches.

Import a (stripped) snapshot of OpenBSD's nc(1) an excellent
reimplementation of the famous tool that can do arbitrary TCP
and UDP connections and listens.

This gaves sysadm the same tool the crackers have, so that
they may learn what the network is about and protect it better.
For developers, this is an invaluable debugging tool, and a
good build block of scripts.

Discussed on: freebsd-hackers@

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

MFV r288243: nc from OpenBSD 5.8.

MFV r258194-264360: nc(1) from OpenBSD 5.5.

MFC after: 2 weeks

MFV: netcat from OpenBSD 5.4.

No functional change.

MFV r249496,249498. The most visible change is that we no longer shuts
down the connection when stdin closes, by default. This matches Hobbit's
original netcat and GNU netcat.

Old behavior can be restored with the new -N flag.

MFC after: 2 weeks

MFV: netcat from OpenBSD 5.2.

MFC after: 1 month

Merge from OpenBSD 5.1.

MFC after: 3 weeks

MFV: nc(1) from OpenBSD 4.9.

MFC after: 1 month
Obtained from: OpenBSD

MFV: nc(1) from OpenBSD 4.8.

While I'm there, bump WARNS level to 2 as the vendor
have the right printf format string now.

MFC after: 1 month
Obtained from: OpenBSD

Remove extra word, which looks like a left-over from a deleted sentence.

Use "printf" instead of "echo -n" in an example because it
should be more compatible for most shells that are out there.

I contacted Philip Guenther at OpenBSD about this PR and he
corrected the issue in their tree pretty fast.

PR: docs/142243
Submitted by: Yasir (yasir27 at mail dot ru)
Obtained from: OpenBSD
Discussed with: delphij
MFC after: 7 days

Diff reduction with OpenBSD:

- Remove unused locally added variable;
- Deprecate -o: it's the default behavior on OpenBSD.

X-MFC: along with nc 4.7.

MFV: Update nc to the version from OpenBSD 4.7.

MFC after: 1 month

Update to 4.6.

Note: the -V option from OpenBSD is implemented using setfib(2) on FreeBSD.

MFC after: 2 weeks

Fix .Dd value -- our mdoc macros don't know how to parse the $Mdocdate$
tag, so the file was being treated as having no date (i.e., the current
date was being inserted).

Approved by: re (kib)

Add an EXIT STATUS section to the manual page. Currently, nc(1)
does not follow sysexits(3), and returns 1 for all error cases.

PR: docs/126451

Update netcat to the version carried with OpenBSD 4.5.

Merge nc(1) from OpenBSD 4.4. While there, rename our '-O' (no
tcp options) to '--no-tcpopt' in order to resolve a comflicit
with OpenBSD's -O semantics.

Document freebsd extensions to netcat a bit better:
- sort the options
- document -o and -O everywhere

Reviewed by: delphij
Approved by: rwatson (mentor)

Resolve conflicts.

Add an -O option to disable TCP options, for protocol testing purposes.
Do this for active and passive (-l switch) TCP sessions.

MFC after: 1 week

Resolve conflicts.

Resolve conflicts.

Fix incorrect command line examples.

Submitted by: Yoshihiko Sarumaru (mistral at imasy dot or dot jp)
PR: docs/94158
MFC after: 2 days

Fix markup in local FreeBSD additions.

Approved by: re (blanket manpages)

Undo the VCS tag move to reduce diff hunks.

Pointed out by: ru

Finish the import of nc(1) from OpenBSD. This includes:
- Bring IPsec support from the ports collection [1].
- Bring -o ("once only") option from the ports
collection [2].
- Adopt the Makefile framework into
usr.bin/nc/Makefile.
- Add a knob to control whether to build nc(1),
NO_NETCAT.
- Bump __FreeBSD_version so ports collection can
detect this change.

Original patchset are contributed to the ports collection by:
[1] nectar, [2] joerg.

Note: WARNS?=6 patchset spined off in this commit, in order not
to take too many files off the vendor branch.

This commit was generated by cvs2svn to compensate for changes in r141261,
which included commits to RCS files with non-trunk default branches.

Import a (stripped) snapshot of OpenBSD's nc(1) an excellent
reimplementation of the famous tool that can do arbitrary TCP
and UDP connections and listens.

This gaves sysadm the same tool the crackers have, so that
they may learn what the network is about and protect it better.
For developers, this is an invaluable debugging tool, and a
good build block of scripts.

Discussed on: freebsd-hackers@