Merge r1908502 from trunk:

mod_http2: Fix memory leak in calc_sha256_hash().
Submitted by: ylavic
Reviewed by: icing, jorton, covener


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1910854 13f79535-47bb-0310-9956-ffa450edef68

modules/http2/h2_push.c

@@ -502,6 +502,7 @@ static void calc_sha256_hash(h2_push_diary *diary, apr_uint64_t *phash, h2_push
     sha256_update(md, push->req->authority);
     sha256_update(md, push->req->path);
     EVP_DigestFinal(md, hash, &len);
+    EVP_MD_CTX_destroy(md);
 
     val = 0;
     for (i = 0; i != len; ++i)