Merge branch 'PHP-7.0' into PHP-7.1

diff --cc NEWS
index 89c0485b4f6780ddbd87210947b207c32c2f6d2f,babe2c23b0bf985848a32834938704f359b66aa0..c024d7ad3707c4a005859d9a23447606b5d608fd
--- 1/NEWS
--- 2/NEWS
+++ b/NEWS
@@@ -33,11 -71,12 +33,13 @@@ PH
      zero-width). (cmb)
    . Fixed bug #72694 (mb_ereg_search_setpos does not accept a string's last
      position). (cmb)
+   . Fixed bug #72710 (`mb_ereg` causes buffer overflow on regexp compile error).
+     (ju1ius)
  
 -- Opcache:
 -  . Fixed bug #72590 (Opcache restart with kill_all_lockers does not work).
 -    (Keyur)
 +- Mysqlnd:
 +  . Fixed bug #71863 (Segfault when EXPLAIN with "Unknown column" error when
 +    using MariaDB). (Andrey)
 +  . Fixed bug #72701 (mysqli_get_host_info() wrong output). (Anatol)
  
  - PCRE:
    . Fixed bug #72688 (preg_match missing group names in matches). (cmb)

diff --cc ext/mbstring/php_mbregex.c
Simple merge