ttl cannot be zero when a sync gateway session is created

If you attempt to execute the curl example we generate with "ttl": 0, you will receive the following error:

{"error":"Bad Request","reason":"Invalid or missing ttl"}

Need to correct our examples to include "ttl": 180 or something similar and mention that ttl value must be greater than 0.

Reporter: Oleg Kuzmin
E-mail: oleg.kuzmin@couchbase.com