Ignore SIGINT (#19)

If someone uses hivemind from the Python interactive console/Jupyter notebooks, the keyboard interrupts (Ctrl+C) are propagated to children processes including the libp2p daemon and the daemon gets killed. This PR fixes this behavior, so the daemon continues to run in background.

Co-authored-by: Aleksandr Borzunov <borzunov.alexander@gmail.com>

Author: dbaranchuk

p2pd/main.go

@@ -10,6 +10,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"os/signal"
 	"strings"
 	"time"
 
@@ -399,6 +400,8 @@ func main() {
 		go func() { log.Println(http.ListenAndServe(c.MetricsAddress, nil)) }()
 	}
 
+	signal.Ignore(os.Interrupt)
+
 	if err := d.Serve(); err != nil {
 		log.Fatal(err)
 	}