Merge branch 'PHP-7.4'

* PHP-7.4:
  Fix bug #78823: add zlib library to mysqlnd

Author: nikic

ext/mysqlnd/config9.m4

@@ -24,6 +24,9 @@ if test "$PHP_MYSQLND" != "no" || test "$PHP_MYSQLND_ENABLED" = "yes"; then
 
 
   if test "$PHP_MYSQLND_COMPRESSION_SUPPORT" != "no"; then
+    PKG_CHECK_MODULES([ZLIB], [zlib])
+    PHP_EVAL_LIBLINE($ZLIB_LIBS, MYSQLND_SHARED_LIBADD)
+    PHP_EVAL_INCLINE($ZLIB_CFLAGS)
     AC_DEFINE([MYSQLND_COMPRESSION_WANTED], 1, [Enable compressed protocol support])
   fi