Add faulthandler for traceback on signals

esl_reader.py

@@ -6,8 +6,10 @@
 #  Reading scroll with speed control
 #  Ability to edit text with updates to word-section links
 #
+import faulthandler
 import os
 import re
+import signal
 import sys
 from typing import Optional, cast
 
@@ -320,4 +322,7 @@ if __name__ == "__main__":
     # XXX - Update the Makefile so that we can run a `make -q` will
     # report back if make needs to be run.
     #
+    faulthandler.enable()
+    faulthandler.register(signal.SIGHUP)
+    faulthandler.register(signal.SIGUSR1)
     sys.exit(main())