Revert "Get the extlen field with unknown operations from a connection."
Revert "Get the extlen field with unknown operations from a connection."

This reverts commit 759e6ff97a298b70e771464aeaae106a890adc43.

The patch calculates the wrong offset for the beginning of the
packet.

daverigby/memcached,daverigby/memcached,daverigby/memcached,jimwwalker/memcached,zbase/memcached,cloudrain21/memcached-1,cloudrain21/memcached-1,owendCB/memcached,mrkwse/memcached,cloudrain21/memcached-1,jimwwalker/memcached,cloudrain21/memcached-1,mrkwse/memcached,couchbase/memcached,daverigby/kv_engine,zbase/memcached,couchbase/memcached,mrkwse/memcached,mrkwse/memcached,abhinavdangeti/memcached,daverigby/kv_engine,abhinavdangeti/memcached,abhinavdangeti/memcached,daverigby/kv_engine,jimwwalker/memcached,daverigby/memcached,couchbase/memcached,owendCB/memcached,daverigby/kv_engine,abhinavdangeti/memcached,zbase/memcached,abhinavdangeti/memcached,zbase/memcached,owendCB/memcached,zbase/memcached,owendCB/memcached,couchbase/memcached