Add optional support for RFC863, Discard Protocol

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

plugins/time.c

@@ -1,4 +1,4 @@
-/* Optional inetd plugin for time (rdate) protocol RFC 868
+/* Optional inetd plugin for Time Protocol (rdate), RFC 868
  *
  * Copyright (c) 2015  Joachim Nilsson <troglobit@gmail.com>
  *
@@ -32,7 +32,7 @@
 #define EPOCH_OFFSET 2208988800ULL
 
 /* Return number of seconds since midnight, 1st Jan, 1900 */
-static int rfc868(int type)
+static int cb(int type)
 {
 	int sd = STDIN_FILENO;
 	time_t now;
@@ -64,7 +64,7 @@ static int rfc868(int type)
 static plugin_t plugin = {
 	.name  = "time",	/* Must match the inetd /etc/services entry */
 	.inetd = {
-		.cmd = rfc868
+		.cmd = cb
 	}
 };