K 10
svn:author
V 2
ae
K 8
svn:date
V 27
2016-11-22T16:43:41.389536Z
K 7
svn:log
V 355
Rework key_flush_sad().

Do all work in three steps:
1) Acquire SAHTREE_RLOCK and check that we need to cleanup som SAs.
   Just return if nothing was found.
2) Acquire SAHTREE_WLOCK and properly unlink SA/SAH from the
   corresponding lists, change state, etc.
3) With released lock finish cleanup (send SADB_EXPIRE message, release
   references, etc).

END