	Turn some assertions into harsh logging.
	Turn some assertions into harsh logging.

	I had some conditions where these assertions were firing due to
cancellation when a server went bad.

Agilefant/spymemcached,tootedom/spymemcached-1,couchbase/spymemcached,HubSpot/java-memcached-client,tootedom/spymemcached,dustin/java-memcached-client,resrugam/java-memcached-client,douxiaozhao/java-memcached-client,douxiaozhao/java-memcached-client,resrugam/java-memcached-client,HubSpot/java-memcached-client,dustin/java-memcached-client,tootedom/spymemcached,dustin/java-memcached-client,Agilefant/spymemcached,couchbase/spymemcached,douxiaozhao/java-memcached-client,1and1/java-memcached-client,tootedom/spymemcached,Agilefant/spymemcached,HubSpot/java-memcached-client,resrugam/java-memcached-client,tootedom/spymemcached-1,couchbase/spymemcached,tootedom/spymemcached-1