When logging a request, if the request environ has a
swift.proxy_logging_status item then use its value for the log
message status int.
The swift.proxy_logging_status hint may be used by other middlewares
when the desired logged status is different from the wire_status_int.
If the proxy_logging middleware detects a client disconnect then any
swift.proxy_logging_status item is ignored and a 499 status int is
logged, as per current behaviour. i.e.:
* client disconnect overrides swift.proxy_logging_status and the
response status
* swift.proxy_logging_status overrides the response status
If the proxy_logging middleware catches an exception then the logged
status int will be 500 regardless of any swift.proxy_logging_status
item.
Co-Authored-By: Alistair Coles <alistairncoles@gmail.com>
Change-Id: I9b5cc6d5fb69a2957b8c4846ce1feed8c115e6b6
5af7719ef3