Fix a major chunk-related memory leak in chunk_dealloc_dss_record(). [1]
Fix a major chunk-related memory leak in chunk_dealloc_dss_record(). [1]

Clean up DSS-related locking and protect all pertinent variables with
dss_mtx (remove dss_chunks_mtx).  This fixes race conditions that could
cause chunk leaks.

Reported by:	[1] kris

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase