I just did some tests with https://redbot.org/ (the site tester by Mark Nottingham) against our server and it notifies of 2 things:
1. The "Keep-Alive" header is deprecated. I tried to "Header unset Keep-Alive" but that has no effect. Seems to be added very late. Do we have a way to suppress it? 2. Validation responses lose the "Vary" header from the unconditional response. This happens on resources where mod_deflate is active. The 200 response without any "if-modified-since" etc. carries "Vary: Accept-Encoding" as it should. The 304 response with "if-modified-since" has no "Vary" header. The code in mod_deflate looks as if it tries to add it in any case, where is it lost? Help in any of the two issues above is appreciated! -Stefan
