Rework logging.

Use log.c like in many other daemons, with small additions to maintain
a log queue (useful to dump a single log line with several logging
statements). Use log.c to dump the internal

Rework logging.

Use log.c like in many other daemons, with small additions to maintain
a log queue (useful to dump a single log line with several logging
statements). Use log.c to dump the internal state, and remove the -R
option (a similar feature will be implemented differently soon).

The end goal is to avoid touching the filesystem and use much tighter
pledge(2) restrictions.

Tested by Freddy Dissaux.

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Another pidfile(3) removal; ok benno@

no need for -D

use poll(2). sync w/kame originally from netbsd

Use pidfile() instead of doing the equivalent thing by hand, and sometimes
forgetting to unlink the pid file at exit.
ok millert@ deraadt@

bring in latest kame code.
- correct RTA_NETMASK processing
- correct -A filter behavior (do not advert aggregated route to other if)
- better signal handling
- mandate getifaddrs
- do not advert con

bring in latest kame code.
- correct RTA_NETMASK processing
- correct -A filter behavior (do not advert aggregated route to other if)
- better signal handling
- mandate getifaddrs
- do not advert connected routes on !IFF_UP routes. experimental
sync with kame

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sync with latest kame.
- correct possible realloc memory leak.
- remove obsolete non-advanced api support (!ADVAPI)
- do not overwrite routing entry, when -A is specified (exit with error).

use getifaddrs, not SIOCGIFCONF, to avoid LP64 alignment issue.

add and enable route6d. fix bogus enties in distrib/sets/lists.

XXX route6d is not really tested on kame/openbsd. there can be some
trouble with kernel advanced API part.