Setting up and extending volume sets and SM pubsets

SM pubsets and volume sets are set up using the SIR utility routine.

SM pubsets and the associated volume sets can be set up together in a SIR run. However, each can also be configured in separate SIR runs. In this case, SIR actions which require an imported pubset (e.g. CREATE-PAGING-FILE) cannot be executed for a single volume set.