bash: update to 4.4.23

bash/src/bash44-021

@@ -0,0 +1,57 @@
+			     BASH PATCH REPORT
+			     =================
+
+Bash-Release:	4.4
+Patch-ID:	bash44-021
+
+Bug-Reported-by:	werner@suse.de
+Bug-Reference-ID:	<201803281402.w2SE2VOa000476@noether.suse.de>
+Bug-Reference-URL:	http://lists.gnu.org/archive/html/bug-bash/2018-03/msg00196.html
+
+Bug-Description:
+
+A SIGINT received inside a SIGINT trap handler can possibly cause the
+shell to loop.
+
+Patch (apply with `patch -p0'):
+
+*** ../bash-20180329/jobs.c	2018-02-11 18:07:22.000000000 -0500
+--- jobs.c	2018-04-02 14:24:21.000000000 -0400
+***************
+*** 2690,2694 ****
+    if (job_control == 0 || (subshell_environment&SUBSHELL_COMSUB))
+      {
+!       old_sigint_handler = set_signal_handler (SIGINT, wait_sigint_handler);
+        waiting_for_child = 0;
+        if (old_sigint_handler == SIG_IGN)
+--- 2690,2704 ----
+    if (job_control == 0 || (subshell_environment&SUBSHELL_COMSUB))
+      {
+!       SigHandler *temp_sigint_handler;
+! 
+!       temp_sigint_handler = set_signal_handler (SIGINT, wait_sigint_handler);
+!       if (temp_sigint_handler == wait_sigint_handler)
+!         {
+! #if defined (DEBUG)
+! 	  internal_warning ("wait_for: recursively setting old_sigint_handler to wait_sigint_handler: running_trap = %d", running_trap);
+! #endif
+!         }
+!       else
+! 	old_sigint_handler = temp_sigint_handler;
+        waiting_for_child = 0;
+        if (old_sigint_handler == SIG_IGN)
+*** ../bash-4.4/patchlevel.h	2016-06-22 14:51:03.000000000 -0400
+--- patchlevel.h	2016-10-01 11:01:28.000000000 -0400
+***************
+*** 26,30 ****
+     looks for to find the patch level (for the sccs version string). */
+  
+! #define PATCHLEVEL 20
+  
+  #endif /* _PATCHLEVEL_H_ */
+--- 26,30 ----
+     looks for to find the patch level (for the sccs version string). */
+  
+! #define PATCHLEVEL 21
+  
+  #endif /* _PATCHLEVEL_H_ */