Stream: postpone session initialization under accept mutex. Previously, it was possible that some system calls could be invoked while holding the accept mutex. This is clearly wrong as it prevents incoming connections from being accepted as quickly as possible.

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


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  $value
#endif

END