Merge tl.davehart.net:C:/ntp/stable/3837

into  tl.davehart.net:C:/ntp/stable/ready-230627

bk: 649b7a3dUcqGUKxWaOEvjjXbfT-4ug

diff --cc ChangeLog
index 4cea1f5b3cd497fbb116c4dfdfca30a2ef50896e,a672f0522e10d26741f75a2b308213aebedf7633..c275318c69af96b48c8562c00e3e413ace8b8481
--- 1/ChangeLog
--- 2/ChangeLog
+++ b/ChangeLog
@@@ -1,13 -1,7 +1,16 @@@
  ---
 +* [Bug 3825] Don't touch HTML files unless building inside a BK repo.
 +             Fix the script checkHtmlFileDates.  <burnicki@ntp.org>
 +* [Bug 3827] Fix build in case CLOCK_HOPF6021 or CLOCK_WHARTON_400A
 +             is disabled.  <burnicki@ntp.org>
 +* [Bug 3828] BK should ignore a git repo in the same directory.
 +             <burnicki@ntp.org>
 +* [Bug 3831] pollskewlist zeroed on runtime configuration. <hart@ntp.org>
 +* [Bug 3835] NTP_HARD_*FLAGS not used by libevent tearoff.
+ * [Bug 3837] NULL pointer deref crash when ntpd deletes last interface.
+              Reported by renmingshuai.  Correct UNLINK_EXPR_SLIST() when the
+              list is empty. <hart@ntp.org>
 +* Add DSA, DSA-SHA, and SHA to tests/libntp/digests.c. <hart@ntp.org>
  
  ---
  (4.2.8p17) 2023/06/06 Released by Harlan Stenn <stenn@ntp.org>