Stream: avoid potential infinite loop at preread phase. Previously the preread phase code ignored NGX_AGAIN value returned from c->recv() and relied only on c->read->ready. But this flag is not reliable and should only be checked for optimization purposes. For example, when using SSL, c->read->ready may be set when no input is available. This can lead to calling preread handler infinitely in a loop.

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


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $have
#define $have  0
#endif

END