Fix lib/libc/nss/getgr_test with large numbers of groups

These tests create a linked list with one entry for every group on the
running system. On a system with about 30,000 groups, the test took 6

Fix lib/libc/nss/getgr_test with large numbers of groups

These tests create a linked list with one entry for every group on the
running system. On a system with about 30,000 groups, the test took 69
seconds to run, and crashed Kyua with the below error:

kyua: E: string or blob too big (sqlite op: sqlite3_bind_blob) (sqlite db: /root/.kyua/store/results.usr_tests.20241231-203317-570235.db).

Fix the test by limiting it to operating on the first 1024 groups.
Apply the same change to getpw_test and getserv_test too, which are
vulnerable to the same problem.

MFC after: 2 weeks
Sponsored by: ConnectWise
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D48275

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libc: Purge unneeded cdefs.h

These sys/cdefs.h are not needed. Purge them. They are mostly left-over
from the $FreeBSD$ removal. A few in libc are still required for macros
that cdefs.h defines. Kee

libc: Purge unneeded cdefs.h

These sys/cdefs.h are not needed. Purge them. They are mostly left-over
from the $FreeBSD$ removal. A few in libc are still required for macros
that cdefs.h defines. Keep those.

Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D42385

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Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

libc/nss tests: Add regression tests for commit 55444c823e1f

PR: 252094
Sponsored by: The FreeBSD Foundation
MFC after: 1 month

libc/nss tests: Fix getpw and getgr single-pass tests

Some NSS regression tests for getgrent(3) and getpwent(3) were not
testing anything because the test incorrectly requested creation of a
databas

libc/nss tests: Fix getpw and getgr single-pass tests

Some NSS regression tests for getgrent(3) and getpwent(3) were not
testing anything because the test incorrectly requested creation of a
database snapshot.

Sponsored by: The FreeBSD Foundation
MFC after: 1 month

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libc/nss tests: Style

Sponsored by: The FreeBSD Foundation
MFC after: 1 month

Merge ^/head r318964 through r319164.

getpw_test: fix -Wunused warnings

- Mark unused parameters __unused.
- Put dump_passwd under DEBUG as it's only used in that case.

MFC after: 3 days
Sponsored by: Dell EMC Isilon

Staticize functions and remove unused variables to aid with bumping WARNS

MFC after: 3 days
Sponsored by: Dell EMC Isilon

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

MFH @r292599

This includes the pluggable TCP framework and other chnages to the
netstack to track for VNET stability.

Security: The FreeBSD Foundation

Integrate tools/regression/lib/libc/nss into the FreeBSD test suite as
lib/libc/tests/nss

- Convert the testcases to ATF
- Do some style(9) cleanups:
-- Sort headers
-- Apply indentation fixes
-- Re

Integrate tools/regression/lib/libc/nss into the FreeBSD test suite as
lib/libc/tests/nss

- Convert the testcases to ATF
- Do some style(9) cleanups:
-- Sort headers
-- Apply indentation fixes
-- Remove superfluous parentheses
- Explicitly print out debug printfs for use with `kyua {debug,report}`; for
items that were overly noisy, they've been put behind #ifdef DEBUG
conditionals
- Fix some format strings

MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division

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