remove mpool_getf

Merge the recursive tree traversal changes from the mit kerberos tree. This
Also make the tracefile customizable. Unfortunately we can't merge any of
the hash changes because they have a different on-disk format. That does not
matter really because we've fixed most of the problems...

branches: 1.27.8;
- centralize opening of regular and temp files to avoid code duplication
- don't cast malloc
- use malloc sizeof(*var) instead of sizeof(type)

branches: 1.26.2;
PR/45989: Martin Husemann: lint invocation does include -w only on i386

- turn lint -w for all the platforms after fixing the lint warnings.
- add _DIAGASSERTS() for casts that would assign values to types that
would not fit.
- change types, add casts
- change into ansii prototypes
- turn on _DIAGNOSTIC for libc (during current, to be eliminated for release
builds)

approved by core@

branches: 1.25.4;
Correct check for snprintf() overflow via Maksymilian Arciemowicz from FreeBSD.
(the bt one was ok, but set errno and make it the same for consistency).
[to be pulled up]

branches: 1.24.4; 1.24.6; 1.24.10; 1.24.14;
Consistently include "nbtool_config.h" when cross-compiling.

In preparation for providing a db fallback in libnbcompat, remove
sccsid and conditionals around __RCSID. lint understands __RCSID enough
to ignore it, undefining LIBC_SCCS is superseded by MKSTRIPIDENT.
No functional changes.

Convert db from UCB types to POSIX types. Prefer uint8_t for u_char as
it is mostly about the wire format.

Patched libc.so is bit-identical.

OK matt@

branches: 1.21.12;
cleanup:
- remove __P
- remove unneeded casts
- add _DIAGASSERT
- add more diagnostics for integer overflow
- fix size_t/int confusion
- make debugging and statistics code compile

branches: 1.20.2;
use FD_CLOEXEC instead of 1.

set close-on-exec flag for fd to database like type DB_HASH does
approved by christos@

hash already uses FD_CLOEXEC -- pay attention to the return value and make it
a hard failure.

Also make btree and recno uses FD_CLOEXEC.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Fix signed/unsigned comparison warnings.

Do not respect TMPDIR when s[ug]id.
from xs@kittenz.org

Don't pull in <sys/param.h> if we don't have to.

branches: 1.13.10; 1.13.12;
delint

Change the file mode argument to dbopen() and the db backends from int to
mode_t.

/tmp to _PATH_TMP from paths.h

If port provides __weak_alias(), provide an Standard C and POSIX pure
identifier namespace by renaming non standard functions and variables
such that they have a leading underscore. The library will use those
names internally. Weak aliases are used to provide the original names
to the API.

This is only the first part of this change. It is most of the functions
which are implemented in C for all NetBSD ports. Subsequent changes are
to add the same support to the remaining C files, to assembly files, and
to the automagically generated assembly source used for system calls.
When all of the above is done, ports with weak alias support should add
a definition for __weak_alias to <sys/cdefs.h>.

Fix RCSID's
Fix gcc warnings.

branches: 1.8.2;
merge DB 1.85 changes

add unintrusive Ids

branches: 1.6.2; 1.6.4;
clean up import

version 1.71 of new db code

upgrade new DB code to version 1.7

Declare rcsid strings so they are stored in text segment.

Add RCS identifiers.

branches: 1.1.1;
update db code to v1.6 from vangogh, and put it in "db" rather than "DB"