Integrate many changes from master

tools/sendDelay.py

@@ -0,0 +1,19 @@
+#! /usr/bin/env python3
+import sys
+import os
+import time
+
+def usage():
+    print(f"usage: {sys.argv[0]} file delay")
+    sys.exit(1)
+
+if len(sys.argv) < 3:
+    usage()
+
+delay=float(sys.argv[2])
+fn=sys.argv[1]
+with open (fn,"r") as fh:
+    for line in fh:
+        print(line,end="",flush=True)
+        time.sleep(delay)
+