Review 22320

Russell C. Jackson (Rusty)
The service user always needs to be defined since the proxy base script uses it as well.
Added note about making sure to leave replica FALSE when setting up a proxy. If you don't
the instance vars script will create an empty database by running the cshow commands.
#2: Change 22333 committed into //guest/perforce_software/sdp/dev/Server/Unix 2 0 0
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