apache: bump to version 2.4.20

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Acked-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/apache/apache.hash

@@ -1,2 +1,2 @@
-# From http://www.apache.org/dist/httpd/httpd-2.4.18.tar.bz2.sha1
-sha1	271a129f2f04e3aa694e5c2091df9b707bf8ef80	httpd-2.4.18.tar.bz2
+# From http://www.apache.org/dist/httpd/httpd-2.4.20.tar.bz2.sha1
+sha1	cefe8ea4a3f81c7a08e36c80ebbd792c67ab361b	httpd-2.4.20.tar.bz2

package/apache/apache.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-APACHE_VERSION = 2.4.18
+APACHE_VERSION = 2.4.20
 APACHE_SOURCE = httpd-$(APACHE_VERSION).tar.bz2
 APACHE_SITE = http://archive.apache.org/dist/httpd
 APACHE_LICENSE = Apache-2.0