Document intended PUT /sln/file/... API.
Document intended PUT /sln/file/... API.

rmoorman/stronglink,nkatsaros/stronglink,iOSCowboy/stronglink,yamingd/stronglink,guiquanz/stronglink,Lacra17/stronglink,Lacra17/stronglink,feld/stronglink,feld/stronglink,Lacra17/stronglink,Ryezhang/stronglink,shaunstanislaus/stronglink,iOSCowboy/stronglink,yamingd/stronglink,iOSCowboy/stronglink,yamingd/stronglink,shaunstanislaus/stronglink,Ryezhang/stronglink,shaunstanislaus/stronglink,btrask/stronglink,guiquanz/stronglink,feld/stronglink,btrask/stronglink,btrask/stronglink,rmoorman/stronglink,guiquanz/stronglink,nkatsaros/stronglink,nkatsaros/stronglink,btrask/stronglink,Ryezhang/stronglink,rmoorman/stronglink