Lighttpd

Since upgrading to 1.4.41 from 1.4.39 my proxy setup does not work anymore. lighttpd seems to close the connection to the backend server right after sending the headers. The frontend receives a 500 HTTP code.

This is what I see in my backend server:

Sep  2 13:56:57 : DEBUG  2016-09-02 13:56:57.259 [WebSession.cpp                :  89] network recv 127.0.0.1:8080 <- 127.0.0.1
Sep  2 13:56:57 : GET /audit.log HTTP/1.0.
Sep  2 13:56:57 : Host: 192.168.2.54.
Sep  2 13:56:57 : User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0.
Sep  2 13:56:57 : Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8.
Sep  2 13:56:57 : Accept-Language: en-US,en;q=0.5.
Sep  2 13:56:57 : Accept-Encoding: gzip, deflate, br.
Sep  2 13:56:57 : Referer: https://192.168.2.54/log-files/.
Sep  2 13:56:57 : Authorization: Basic YWRtaW46ZXNpZXJz.
Sep  2 13:56:57 : Upgrade-Insecure-Requests: 1.
Sep  2 13:56:57 : Cache-Control: max-age=0.
Sep  2 13:56:57 : X-Forwarded-For: 192.168.2.10, 127.0.0.1.
Sep  2 13:56:57 : X-Host: 192.168.2.54, 192.168.2.54.
Sep  2 13:56:57 : X-Forwarded-Proto: https, http.
Sep  2 13:56:57 : Connection: close.
Sep  2 13:56:57 : .
Sep  2 13:56:57 : DEBUG  2016-09-02 13:56:57.262 [WebSession.cpp                : 779] network closed 127.0.0.1:8080 <- 127.0.0.1

Removing server.max-keep-alive-requests = 0 from the config changes the behaviour slightly resulting in the connection being closed somewhat later (but still to early).