I want to confirm the “exptime” unit in “lcb_store_cmd_t”.
I can NOT get the definite unit information from lcb_store api html（here: http://www.couchbase.com/autodocs/couchbase-c-client-2.1.3/lcb_store.3couchbase.html）.
Although I have read the expiration explanation in the devguide (here: http://docs.couchbase.com/couchbase-devguide-2.1/#about-document-expiration), I can NOT confirm that the exptime unit is seconds.
I want to set the expiry time as two days ( 172800seconds)， so I assign the exptime param with 172800, then call lcb_store. Is this OK?