-consistently use "char *" for the compiled policy buffer in the
ipsec_*_policy() functions, as it was documented and used by clients
-remove "ipsec_policy_t" which was undocumented and only present
in the KAME version of the ipsec.h header
-misc cleanup of historical artefacts, and to remove unnecessary
differences between KAME ans FAST_IPSEC

branches: 1.12.6;
no need for noinput

define YY_NO_INPUT where appropriate, from Kurt J. Lidl per PR misc/41160

Enable WARNS=4 by default except for:
dump dump_lfs fsck_ffs fsck_lfs fsdb mount_smbfs
newfs_ext2fs newfs_lfs resize_lfs setkey

branches: 1.9.30;
Redo previous rework to generate yacc/lex output again and remove generated
copies from the import as they don't compile clean across all archs.

Don't yacc/lex here as dist includes generated copies already and depending
on timestamps it's possible for gcc2 on vax to get confused on which .h
to use.

Move WARNS=3 to the Makefile.inc, and add a little const to the remaining
programs that did not compile before.

branches: 1.6.2;
Define SADB_X_EALG_AESCBC=SADB_X_EALG_AES, as we define SADB_X_EALG_AES
in <net/pfkeyv2.h> while ipsec-tools uses SADB_X_EALG_AESCBC in the code.

Additional cleanup pass.

Switch to ipsec-tools for libipsec, setkey, and racoon. From
Emmanuel Dreyfus, with some small changes by me.

Use ${NETBSDSRCDIR}/some/path instead of ${.CURDIR}/../../some/path

use YHEADER, not YFLAGS+=-d. from kre

branches: 1.1.4;
move setkey(8) from usr.sbin to sbin, to enable us to initialize
IPsec manual key before /usr mount..
(based on "don't use cvsmove" discussion i have seen, I did not use cvsmove)