Chunk server: fix ops queue traversal with client threads entries. Check if client state machine entry was deleted before attempting to flush connection.
Chunk server: fix ops queue traversal with client threads entries. Check if client state machine entry was deleted before attempting to flush connection.

thebigbrain/qfs,quantcast/qfs,quantcast/qfs,chanwit/qfs,quantcast/qfs,quantcast/qfs,qnu/qfs,thebigbrain/qfs,thebigbrain/qfs,chanwit/qfs,thebigbrain/qfs,fengshao0907/qfs,qnu/qfs,quantcast/qfs,quantcast/qfs,qnu/qfs,thebigbrain/qfs,qnu/qfs,qnu/qfs,fengshao0907/qfs,fengshao0907/qfs,quantcast/qfs,chanwit/qfs,thebigbrain/qfs,fengshao0907/qfs,quantcast/qfs,fengshao0907/qfs,chanwit/qfs,fengshao0907/qfs,chanwit/qfs,chanwit/qfs,chanwit/qfs,qnu/qfs,thebigbrain/qfs,fengshao0907/qfs,qnu/qfs,qnu/qfs,chanwit/qfs,thebigbrain/qfs,fengshao0907/qfs