Proposal: Extend files endpoint to allow changing the 'stuck' field of files + siac cmd to set all files to unstuck
This MR extends the
/renter/files/:siapath endpoint to allow setting the
stuck field for individual files.
It also adds the siac command
siac renter unstuckall which changes the status of all files to
false. This is useful in case a bug causes large numbers of siafiles to be stuck.