'--header',"'x-archive-meta-subject:%s'"%('; '.join(wikikeys)),# Keywords should be separated by ; but it doesn't matter much; the alternative is to set one per field with subject[0], subject[1], ...
"http://s3.us.archive.org/wiki-%s/%s"%(wikiname,dump),# It could happen that the identifier is taken by another user; only wikiteam collection admins will be able to upload more files to it, curl will fail immediately and get a permissions error by s3.
'> /dev/null',
#FIXME: Must be NUL instead on Windows, how to make compatible?