Set encryption key
SYNOPSIS
- #include <libmemcached/memcached.h>
- Compile and link with -lmemcached 
- 
memcached_return_t memcached_set_encoding_key(memcached_st *ptr, const char *str, const size_t length)
- Parameters:
- ptr -- pointer to initialized - memcached_ststruct
- str -- the key to use 
- length -- the length of - keywithout any terminating zero
 
- Returns:
- memcached_return_tindicating success
 
DESCRIPTION
memcached_set_encoding_key() sets the key that will be used to encrypt and
decrypt data as it is sent and received from the server.
Currently only AES is is supported.
RETURN VALUE
A value of type memcached_return_t is returned.
On success that value will be MEMCACHED_SUCCESS.
Use memcached_strerror() to translate this value to a printable string.