Merge branch 'stable' of https://github.com/tarantool/tarantool into stable

.gitignore

.gitmodules

cmake/BuildMisc.cmake

cmake/compiler.cmake

debian/changelog

debian/control

debian/copyright

doc/user/stored-procedures.xml

doc/user/target.db

extra/rpm.spec.in

include/avl_tree.h

include/ipc.h

include/tarantool/config.h.cmake

src/box/avl_tree_index.h

src/box/lua/box_net.lua

src/fiob.c

src/ipc.cc

src/lua/init.cc

src/lua/lua_ipc.cc

src/module/sophia/CMakeLists.txt