Update from 1.4.2 to 1.4.3.

<ChangeLog>

*) Bugfix: a segmentation fault might occur in a worker process if the

ngx_http_spdy_module was used with the "client_body_in_file_only"
directive.

*) Bugfix: a segmentation fault might occur on start or during

reconfiguration if the "try_files" directive was used with an empty
parameter.

*) Bugfix: the $request_time variable did not work in nginx/Windows.

*) Bugfix: in the ngx_http_auth_basic_module when using "$apr1$"

password encryption method.
Thanks to Markus Linnala.

*) Bugfix: in the ngx_http_autoindex_module.

*) Bugfix: in the mail proxy server.

</ChangeLog>