ToUsenet: subject prefix stripping

[mdw21]

For some inexplicable reason ToUsenet is trying to -add- the
subject prefix. Now this doesn't work generally anyway (consider
a plain post - this won't do it). Typically, the subject prefix is the list-
name, which just replicates information we already have (as we
already know which newsgroup we are looking
at).

Anyway, arguments aside, I've fixed up ToUsenet.py
to go the other way and remove subjects.

(I would have
made this an option, but my Python is non-existent).

[mdw21 (mdw21)]

The file ToUsenet.patch was added: removes subject prefix when posting

[bwarsaw (bwarsaw)]

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This is a duplicate of 573508