[$] The first half of the 7.1 merge window

The 7.1 merge window opened on April 12 with the releaseof the 7.0 kernel. Since then, 3,855 non-merge changesets have beenpulled into the mainline repository for the next release. This mergewindow is thus just getting started, but there has still been a fair amountof interesting work moving into the mainline.