Proxy: simplified conditions of using unparsed uri. Previously, the unparsed uri was explicitly allowed to be used only by the main request. However the valid_unparsed_uri flag is nonzero only in the main request, which makes the main request check pointless.

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


cat << END >> $NGX_AUTO_CONFIG_H

#ifndef $ngx_param
#define $ngx_param  $ngx_value
#endif

END