Update the man page

- Add -V option
- Use uniform and correct capitalization for OpenStack Swift
- Make the example of output of stat command up-to-date
- Generally prettify the document
- Remove all trailing whitespace

Change-Id: Id3da2035851847c4bff8cec8f927d3654824bf5b
log get_auth request url instead of x-storage-url

because if the request gets a 4xx error, then the url will be None, and that's just confusing.

Change-Id: I62729364b9bd279498909dc5cd0d2a1ec5fcd70d