Merge remote-tracking branch 'origin/1.7' into 1.8

cmake/module.cmake

debian/control

extra/dist/tarantoolctl.in

extra/luarocks/site_config.lua.cmake

rpm/tarantool.spec

src/CMakeLists.txt

src/box/CMakeLists.txt

src/box/alter.cc

src/box/box.cc

src/box/engine.cc

src/box/engine.h

src/box/index.cc

src/box/index.h

src/box/iproto.cc

src/box/lua/load_cfg.lua

src/box/lua/schema.lua

src/box/memtx_engine.cc

src/box/memtx_engine.h

src/box/memtx_tuple.cc

src/box/port.c