[spambayes-dev] -o cmd line flag

[Skip Montanaro]

I added the -o flag to the following scripts:

    sb_dbexpimp.py
    sb_imapfilter.py
    sb_mboxtrain.py
    sb_notesfilter.py
    sb_pop3dnd.py
    sb_server.py
    sb_upload.py
    sb_xmlrpcserver.py

I can't really test them effectively since I don't use any of them, but the
change was straightforward.  I did try

    sb_server.py -o global:verbose:true

and

    sb_server.py -o globals:verbose:true

The first complained as it should about "global" not being a valid section
name.

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