Add note about socat in data server.
+//Don't use this.
+// Use the following:
+// ./data_recorder | socat - tcp-listen:5555,fork > /dev/null
+// SOCAT is better.
+
//Blatantly ripped off of https://www.cs.cmu.edu/afs/cs/academic/class/15213-f99/www/class26/tcpserver.c
#include <stdio.h>
