Deletion of Direct Save Protocol

Comment: This is a verifiable protocol per the spec linked to in the external sources. It is a small but important addition of the X drag and drop protocol. It is then worth merging the first sentence into X_Window_selection#XDND with the spec as a source verifying as an |alternative to deletion. --&#123;&#123;u&#124
Stance: merge
Cited policy: Wikipedia:Deletion policy (WP:ATD)