Review 18885

Russell C. Jackson (Rusty)
Added check for shelvedfiles.txt to avoid failure on the open.

Added check for user name in the server to avoid reprocessing a user that has already been
deleted if you run the script on the same userlist twice.

#review @tom_tyler
#2: Change 18888 committed into //guest/perforce_software/sdp/dev/Maintenance 1 0 0
Tip: Use n and p to cycle through the changes.