[refactor] daemon should always bind on sockets
The way 0MQ works on PUB/SUB sockets, publishers might drop messages if subscribers are not detected faster enough. One way to fix it is to have the "server" always bind sockets, and the "client" use connect. This way, the handshake is initiated properly, and the client can publish as soon as the connection is done. This patch makes the daemon bind on the upstream API and the CLI connect, fixing in the process the message dropping we were experiencing before. Long term, we might have a think of using 2 types of sockets for the upstream API: pub/sub for actual events published from the daemon, and a REQ/REP or ROUTER/DEALER pair for "commands".
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