REGTESTS: add a test to prevent h2 desync attacks

This test ensure that h2 pseudo headers are properly checked for invalid
characters and the host header is ignored if :authority is present. This
is necessary to prevent h2 desync attacks as described here
https://portswigger.net/research/http2

(cherry picked from commit 7ef244d73b073edf3d493ed826ca1b0233c330e0)
Signed-off-by: Willy Tarreau <w@1wt.eu>
1 file changed