Fix for bug #76582

The brigade seems to end up in a messed up state if something fails
in shutdown, so we clean it up.

Author: smalyshev

sapi/apache2handler/sapi_apache2.c

@@ -678,6 +678,7 @@ zend_first_try {
 	if (!parent_req) {
 		php_apache_request_dtor(r TSRMLS_CC);
 		ctx->request_processed = 1;
+		apr_brigade_cleanup(brigade);
 		bucket = apr_bucket_eos_create(r->connection->bucket_alloc);
 		APR_BRIGADE_INSERT_TAIL(brigade, bucket);