tarball format inconcistent between bdist_rpm and sdist (and maybe other)

[olahaye74]

tarball format inconcistent between bdist_rpm and sdist (and maybe other)

[bdist_rpm]
use-bzip2 = 1
[sdist]
formats = bztar

Can't it be unified? this is ugly to have different option name for the same thing depending on the context.

That would also help removing the following line from bdist.py:
# The following commands do not take a format option from bdist
no_format_option = ('bdist_rpm',)