Differences from memcached.

Differences from memcached 1.4

Implementations of binary protocol command GaT and Get are identical.
Both may have an optional expiration time. Objects will be touched only when the command is attended with an expiration time.
stats returns different items.
stats slabs is not implemented.
stats cachedump is not implemented.
stats ops returns ops counts for each text/binary command.
slabs automove and slabs reassign are not implemented.
These always return "OK".
verbosity takes a string argument rather than an integer.
Valid values are error, warning, info, and debug.
UDP transport is not implemented.
UNIX domain transport is not, and will not be, implemented.
SASL authentication is not implemented. Who cares?

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