QUIC: reallocate qc->dcid on retry. Previously new dcid was generated in the same memory that was allocated for qc->dcid when creating the QUIC connection. However this memory was also referenced by initial_source_connection_id and retry_source_connection_id transport parameters. As a result these parameters changed their values after retry which broke the protocol.

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


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  0
#endif

END