Map: fixed optimization of variables as values. Previous code incorrectly used ctx->var_values as an array of pointers to ngx_http_variable_value_t, but the array contains structures, not pointers. Additionally, ctx->var_values inspection failed to properly set var on match.

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


cat << END >> $NGX_AUTO_CONFIG_H

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

END