less elapsed time: ! and ^Z

Suppress any time spent in a sub-shell or in the background when
accumulating total elapsed play time.

This won't help for leaving the game idle instead of saving and
restoring.  That's a can of worms I'd prefer to leave sealed.

doc/fixes37.0

@@ -1,4 +1,4 @@
-NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.629 $ $NHDT-Date: 1629817676 2021/08/24 15:07:56 $
+NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.630 $ $NHDT-Date: 1629928191 2021/08/25 21:49:51 $
 
 General Fixes and Modified Features
 -----------------------------------
@@ -594,6 +594,8 @@ concealed mimic could trigger sanity check warning "mimic concealed as an
 	object despite Prot-from-shape-changers" if hidden as "strange object"
 cancelled shape changer would become uncancelled if saved and restored (even
 	just leaving its level and then returning)
+don't include time spent suspended in background (^Z) or in shell escape (!)
+	in the total elapsed time recorded to xlogfile
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository

src/cmd.c

@@ -1,4 +1,4 @@
-/* NetHack 3.7	cmd.c	$NHDT-Date: 1627408993 2021/07/27 18:03:13 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.481 $ */
+/* NetHack 3.7	cmd.c	$NHDT-Date: 1629928192 2021/08/25 21:49:52 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.483 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /*-Copyright (c) Robert Patrick Rankin, 2013. */
 /* NetHack may be freely redistributed.  See license for details. */
@@ -4841,8 +4841,13 @@ dosuspend_core(void)
 #ifdef SUSPEND
     /* Does current window system support suspend? */
     if ((*windowprocs.win_can_suspend)()) {
+        time_t now = getnow();
+
+        urealtime.realtime += timet_delta(now, urealtime.start_timing);
+        urealtime.start_timing = now; /* as a safeguard against panic save */
         /* NB: SYSCF SHELLERS handled in port code. */
         dosuspend();
+        urealtime.start_timing = getnow(); /* resume keeping track of time */
     } else
 #endif
         Norep(cmdnotavail, "#suspend");
@@ -4854,8 +4859,13 @@ static int
 dosh_core(void)
 {
 #ifdef SHELL
+    time_t now = getnow();
+
+    urealtime.realtime += timet_delta(now, urealtime.start_timing);
+    urealtime.start_timing = now; /* (see dosuspend_core) */
     /* access restrictions, if any, are handled in port code */
     dosh();
+    urealtime.start_timing = getnow();
 #else
     Norep(cmdnotavail, "#shell");
 #endif