Nginx patch for unexpected FASTCGI_END_REQUEST on php keep_conn + fastcgi_finish_request

[Dmitry Saprykin]

Hello,

This changeset adds support for FastCGI FCGI_END_REQUEST record type.
Now nginx does not process this type of FastCGI record.
In case of usage php fastcgi upstream which finishes FastCGI
requests before end of script using fastcgi_finish_request() call
it leads to "upstream sent unexpected FastCGI record: 3 while reading
response header from upstream" error messages and 502 for clients.

Changeset parses FCGI_END_REQUEST FastCGI records and ignores it
if keep_conn is enabled and record has type FCGI_REQUEST_COMPLETE.


Kind regards,
Dmitry Saprykin
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