testing: split interop-ikev1-strongswan-12-esp-sha2 in two

interop-ikev1-strongswan-12-esp-sha2_256
interop-ikev1-strongswan-13-esp-sha2_512
testing: remove two abandoned racoon tests
kernel: indent less on veeeeery long snprintf()
kernel: numerate veeeery long snprintf parameter list

This list is way too long to keep in sync. Add numbered comments. You
will hate this, but this is the only way to make sure they are
in sync. Sorry. Please consider splitting this to multiple snprintf calls.
kernel: PLUTO_ADDTIME is %lu, so parameter must be 0L instead 0
kernel: add_time is defined as uint64_t, convert it to long for %lu
CHANGES: update for bug#206 fix
Merge branch 'master' into github_master
Merge branch 'master' of https://github.com/libreswan/libreswan into github_master