Lispworks: use PROCESS-PROPERTY instead of PROCESS-PRIVATE-PROPERTY
Lispworks: use PROCESS-PROPERTY instead of PROCESS-PRIVATE-PROPERTY

Process private properties are removed when the process exits

mcna/bordeaux-threads,ober/bordeaux-threads,ober/bordeaux-threads,sionescu/bordeaux-threads,sionescu/bordeaux-threads,mcna/bordeaux-threads