Don't make things warnings that aren't; update info text for --multi-version.  (backport from trunk)
Don't make things warnings that aren't; update info text for
--multi-version.  (backport from trunk)

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4046390

pypa/setuptools,pypa/setuptools,pypa/setuptools