Raised simultaneous subrequest limit from 50 to 200. It wasn't enforced for a long time, and there are reports that people use up to 100 simultaneous subrequests now. As this is a safety limit to prevent loops, it's raised accordingly.

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


have=NGX_SUPPRESS_WARN . auto/have

have=NGX_SMP . auto/have