Chunk server: update in flight buffers byte count, as soon as the client connection gets closed.
Chunk server: fix now misleading / outdated comment.
Chunk server: fix buffer accounting (release / decrement) for "theoretically" possible write sync op. The correct buffer accouning is now possible as buffer bytes is stored in the kfs op itself.
Qfs C bindings: fix lint warnings, and memory leak in the unit test code.
Merge branch 'master' into topic/krb
Kfsio lib: continue on delegation token implementation.