Signed-off-by: Florent Bruneau <florent.bruneau@polytechnique.org>
# - client_awl: number (default: 5)
# number of successful greylisting before the client get whitelisted (0 means,
# no-auto-whitelist).
+# - max_age: number (default: 30 * 3600)
+# lifetime of a greylist/whitelist session: ie, if a client does ne reappear during
+# max_age seconds, the entries associated to this client are invalidated.
# Return value:
# - if the client is whitelisted, returns whitelist
# - if the client is greylisted, returns greylist