Merge remote-tracking branch 'origin/master' into 1.6

doc/sphinx/_templates/menu

doc/sphinx/book/administration.rst

doc/sphinx/book/app/b_proctitle.rst

doc/sphinx/book/box/box_index.rst

doc/sphinx/book/box/box_space.rst

doc/sphinx/book/box/index.rst

doc/sphinx/book/configuration/cfg-basic.rst

doc/sphinx/book/configuration/cfg-logging.rst

doc/sphinx/book/configuration/cfg-storage.rst

doc/sphinx/reference/clock.rst

doc/sphinx/reference/console.rst

doc/sphinx/reference/fiber.rst

doc/sphinx/reference/index.rst

doc/sphinx/reference/net_box.rst

doc/sphinx/reference/socket.rst

doc/www/content/newsite/download.yml.in

doc/www/content/newsite/index.yml

src/box/lua/session.c

test-run