Schedule events against the monotonic clock.

So that events fire punctually, even if the system clock is changed.

ok jca@

Use %zu for size_t arguments

stdlib.h is in scope; do not cast malloc/calloc/realloc*
ok millert krw

Having more than 2 log levels is silly. Use only 3 verbosity levels:
None (), Important (-v), All (-vv)
ok deraadt@

whitespace cleanup, no binary change.

Various logging fixes, handle peer disconnects better.

Move sasyncd(8), for IPsec SA synchronization, in-tree. Work in progress.
deraadt@ ok.