MFC r336511:
Whitespace changes due to changes in ident.

Revert r330897:

This was intended to be a non-functional change. It wasn't. The commit
message was thus wrong. In addition it broke arm, and merged crypto
related code.

Revert with prejudice.

This revert skips files touched in r316370 since that commit was since
MFCed. This revert also skips files that require $FreeBSD$ property
changes.

Thank you to those who helped me get out of this mess including but not
limited to gonzo, kevans, rgrimes.

Requested by: gjb (re)

Partial merge of the SPDX changes

These changes are incomplete but are making it difficult
to determine what other changes can/should be merged.

No objections from: pfg

MFC r309682:

Cleanup the names of SSN, SID, TSN, FSN, PPID and MID.

This made a couple of bugs visible in handling SSN wrap-arounds
when using DATA chunks. Now bulk transfer seems to work fine...
This fixes the issue reported in
https://github.com/sctplab/usrsctp/issues/111

MFC r309607:

Whitespace changes.

The tools using to generate the sources has been updated and produces
different whitespaces. Commit this seperately to avoid intermixing
these with real code changes.

MFC r302904:
Fix a bug which results in a core dump when running netstat with
the -W option and having a listening SCTP socket.
The bug was introduced in r279122 when adding support for libxo.

MFC r302907:
When calling netstat -Laptcp the local address values are not aligned
with the corresponding entry in the table header. r295136
increased the value width from 14 to 32 without the corresponding
change to the table header. This commit adds the change to the table
header width.

MFC r302917:
Ensure that the -a, -W, -L options for SCTP behave similar
as for TCP.

MFC r302928:
Address a potential memory leak found a the clang static code analyzer
running on the userland stack.

MFC r302930:
Don't free a data chunk twice.
Found by the clang static code analyzer running for the userland stack.

MFC r302935:
Deal with a portential memory allocation failure, which was reported
by the clang static code analyzer.
Joint work with rrs@.

MFC r302942:
Add missing sctps_reasmusrmsgs counter.
Joint work with rrs@.

MFC r302945:
Don't duplicate code for SCTP, just use the ones used for UDP and TCP.
This fixes a bug with link local addresses. This will require and
upcoming change in the kernel to bring SCTP to the same behaviour
as UDP and TCP.

MFC r302949:
Fix the PR-SCTP behaviour.
This is done by rrs@.

MFC r302950:
Add a constant required by RFC 7496.

MFC r303024:
netstat and sockstat expect the IPv6 link local addresses to
have an embedded scope. So don't recover.

MFC r303025:
Use correct order of conditions to avoid NULL deref.

MFC r303073:
Fix a bug in deferred stream reset processing which results
in using a length field before it is set.
Thanks to Taylor Brandstetter for reporting the issue and
providing a fix.

Approved by: re (kib)