movefile => only for sysops

Per request on https://meta.orain.org/w/index.php?title=Request_features&oldid=6979#Keionrail_.28Status:_Open.29 - NAMESPACE seems done, does upload for ONLY autoconfirmed, confirmed make it impossible for non-(auto)confirmed to use rights reupload and reupload-shared?
Merge pull request #239 from Southparkfan/patch-4

movefile => only for sysops