Hello, I'm not sure if this has been brought up before, but using negative expiration values for eg set causes a MEMCACHED_MEMORY_ALLOCATION_FAILURE error using the ascii protocol, even though the ascii protocol somewhat supports negative expiration values (after reading through memcached/memcached#142).
The binary protocol takes time_t and passes an unsigned expiration which seems like it would cause large expiration times rather than expiring immediately? Other clients seems to do this though, so maybe that's expected.
Since negative expiration should expire immediately, thoughts on setting the expiration to 1 if negative?
This seems similar to #76