We are using the "autobind" feature of Linux to get a special
socket address. This allows us to have roughly 2^20 clients on
the system.
Change-Id: Ie9b9ac6267f40345baf7dbb3becaecf264a5df5f
Add a JSON encoder and a small module to sent registration and
other events per unix datagram socket.
json.lua fetched using:
$ wget -O src/osmo_ms_driver/lua/json.lua \
https://raw.githubusercontent.com/rxi/json.lua/master/json.lua
Change-Id: I43ae84a944c7f33e41d5de0880d4aaab3378809b