MsQuic v2.1.9

What's Changed

• CP 2.1: Move VPack to OneBranch (#3763) by @nibanks in #3764
• Don't Allow Version Negotiation Packets for Server Connections (d1cb96a)
• Fix Memory Leak from Multiple Decodes of TP (c80f35d)
• Drop Unsupported New Token Initial Tokens (f63dc61)

Please note that the above changes include fixed for HIGH severity security issues (more info here and here). Please update your servers immediately.

Full Changelog: v2.1.8...v2.1.9