www/freenginx-devel: update to 1.29.5

<ChangeLog>

*) Feature: optimized SSL_sendfile() usage on FreeBSD.

Thanks to Gleb Smirnoff.

*) Bugfix: upstream servers were not marked as failed after a response

with status code 500, 502, 503, 504, or 429 if the code was listed in
the "proxy_next_upstream" directive, but switching to the next server
was not possible.

*) Bugfix: the "stale-if-error" cache control extension was not applied

if a backend returned a response with status code 500, 502, 503, 504,
or 429 and the code was listed in the "proxy_next_upstream"
directive.

*) Bugfix: in handling of premature backend responses.

</ChangeLog>

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