Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
  Fix #78751: Serialising DatePeriod converts DateTimeImmutable

diff --cc NEWS
index 767c3ea25a88d0c724fb011cd00c6e7b959640b1,c03d16720cc2a2990aef8d034608aa9a441b46a9..01336b9c73839edfbd9a738a74141c4eba10b900
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -10,45 -14,8 +10,46 @@@ PH
  
  - Date:
    . Fixed bug #70153 (\DateInterval incorrectly unserialized). (Maksim Iakunin)
+   . Fixed bug #78751 (Serialising DatePeriod converts DateTimeImmutable). (cmb)
  
 +- FFI:
 +  . Fixed bug #78716 (Function name mangling is wrong for some parameter 
 +    types). (cmb)
 +
 +- FPM:
 +  . Fixed bug #78599 (env_path_info underflow in fpm_main.c can lead to RCE).
 +    (CVE-2019-11043) (Jakub Zelenka)
 +  . Fixed bug #74083 (master PHP-fpm is stopped on multiple reloads).
 +    (Maksim Nikulin)
 +
 +-Opcache:
 +  . Fixed bug #78512 (Cannot make preload work). (Dmitry)
 +
 +- Reflection:
 +  . Fixed bug #78697 (ReflectionClass::implementsInterface - inaccurate error 
 +    message with traits). (villfa)
 +
 +- Testing:
 +  . Fixed bug #78684 (PCRE bug72463_2 test is sending emails on Linux). (cmb)
 +
 +17 Oct 2019, PHP 7.4.0RC4
 +
 +- Core:
 +  . Fixed bug #78614 (Does not compile with DTRACE anymore).
 +    (tz at FreeBSD dot org)
 +  . Fixed bug #78620 (Out of memory error). (cmb, Nikita)
 +  . Fixed bug #78632 (method_exists() in php74 works differently from php73 in
 +    checking priv. methods). (Nikita)
 +  . Fixed bug #78644 (SEGFAULT in ZEND_UNSET_OBJ_SPEC_VAR_CONST_HANDLER).
 +    (Nikita)
 +  . Fixed bug #78658 (Memory corruption using Closure::bindTo). (Nikita)
 +  . Fixed bug #78656 (Parse errors classified as highest log-level). (Erik
 +    Lundin)
 +  . Fixed bug #78662 (stream_write bad error detection). (Remi)
 +
 +- COM:
 +  . Fixed bug #78650 (new COM Crash). (cmb)
 +
  - Iconv:
    . Fixed bug #78642 (Wrong libiconv version displayed). (gedas at martynas,
      cmb).

diff --cc ext/date/php_date.c
Simple merge