Gustaf Lundh e45c333b70 GetUserFilter: Allow to include username in servlet response header
Add a new setting, http.addUserAsResponseHeader, which when enabled
causes the servlet response to include a 'User' header that contains
the name of the logged in user.

This will enable reverse proxies to log the name of the user that
issued the http request.

The new setting is disabled by default.

Change-Id: I5c3c783813f3aa71209320610bb8168a51305cba
2018-05-08 12:51:44 +09:00
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