HTTP/2: fixed ngx_http_v2_push_stream() allocation error handling. In particular, if a stream object allocation failed, and a client sent the PRIORITY frame for this stream, ngx_http_v2_set_dependency() could dereference a null pointer while trying to re-parent a dependency node.

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  1
#endif

END