[$] 5.8 Merge window, part 1

Just over 7,500 non-merge changesets have been pulled into the mainlinerepository since the opening of the 5.8 merge window - not a small amountof work for just four days. The early pulls are dominated by thenetworking and graphics trees, but there is a lot of other material inthere as well. Read on for a summary of what entered the kernel in thefirst part of this development cycle.