Added security for files created by pfs/Async [EBF 4.2.3]

The user ID for the person running pfs/Async is now recorded in the USER_IDENT field of the log file, trlog. Also, the files archived by the pfs/Async host will have the RunID of the pfs/Async host appended to the end of the file name. This ensures that the archived files have unique names, even if they are archived into common directories.