saving remote sockaddr to WAL
Merge remote-tracking branch 'origin/stable' into saving-remote-sockaddr-to-WAL
gh-35, opentar-45: review fixes

Remove get_socket_addr(), use existing sockaddr_in
to save in the cookie.
Merge branch 'stable', opentar-45

Conflicts:
	src/admin.cc
	src/admin.rl
	src/box/txn.cc
	src/lua/init.cc
	src/memcached.cc
	src/session.cc