component/apache: version up 2.4.28, including security fixes.

component/apache/buildout.cfg

@@ -34,9 +34,9 @@ md5sum = 2202b18f269ad606d70e1864857ed93c
 [apache]
 # inspired on http://old.aclark.net/team/aclark/blog/a-lamp-buildout-for-wordpress-and-other-php-apps/
 recipe = slapos.recipe.cmmi
-version = 2.4.27
+version = 2.4.28
 url = https://archive.apache.org/dist/httpd/httpd-${:version}.tar.bz2
-md5sum = 97b6bbfa83c866dbe20ef317e3afd108
+md5sum = 49007ffe8e37a0834255b279810edf24
 pre-configure =
   cp -ar ${apr:location}/apr-${apr:version} srclib/apr/ &&
   cp -ar ${apr-util:location}/apr-util-${apr-util:version} srclib/apr-util