Upon pressing "Upload file" in Wikipedia (as an example) - the user should not only be
confronted with a "Select file" and "Summary" box, but also a drop down box with licenses.
This license box may be left blank for the user to fill in later - but if selected the license
template will be added to the page automatically.
More importantly, if a copyleft license is selected - GFDL, PD, CC, etc. - the image is not
uploaded to the Wikipedia project in which the user is operating, but to Commons. Conversely,
all non-copyleft images are only uploaded to that local project. This file may be a form of
metafile, in which case the user could over-ride the upload to commons, and instead simply
locally upload it.