:sig
bool memcache_set(u64 connection, String key, String value, u64 expires_in = 60*60)

:params
connection : connection handle
key : the entry's key
value : the value to be set
expires_in : optional expiration timeout, defaults to one hour
return value : true if the operation was successful

:desc
Stores a 'value' on the Memcache server.

:see
>memcache