Added changes for fw-daemon to check sandboxed processes' oz-init /proc/[pid]/net/tcp with procsnitch.
fw-daemon IPC accepts "register-init" command to register new oz-init process instance alerts.
fw-daemon also checks for existing oz-init processes on startup.
Updated vendor-bundled go-procsnitch to latest dev version that includes findTCPSocketAll().
fw-daemon prompter is now updated with source address of originating packet.
Fixed bug in decoding DNS data.
Packets are dropped properly (by marking and then calling Accept()).