MINOR: quic: Stop hardcoding a scale shifting value (CUBIC_BETA_SCALE_FACTOR_SHIFT)

Very minor modification to replace a statement with an hardcoded value by a macro.

Should be backported as far as 2.6 to ease any further modification to come.

(cherry picked from commit 96385f40b508a395fcd802a9dff13e968c12433d)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit dedf0f44503a962bbbfde0bd5b21560798ebe59d)
Signed-off-by: Willy Tarreau <w@1wt.eu>
1 file changed