Description
The underlying memcached binary protocol does not support TTL on prepend/append operations:
https://code.google.com/p/memcached/wiki/BinaryProtocolRevamped#Append,_Prepend
However the the SDK API suggests other wise:
http://www.couchbase.com/autodocs/couchbase-php-client-1.2.2/classes/Couchbase.html#method_append
We need to remove the TTL options from these commands:
append
prepend
This was 1st discovered in the Python SDK: PYCBC-261