relnote: Require QUIC handshakes to require either a valid server nonce or a remote strike register.

net/quic/quic_flags.cc

Index: net/quic/quic_flags.cc
diff --git a/net/quic/quic_flags.cc b/net/quic/quic_flags.cc
index 580b8fb2125e19fd4429cc74a9d7f775d8091ba8..3eb3830e3e894d89e9befefef5e60851bfa91b00 100644
--- a/net/quic/quic_flags.cc
+++ b/net/quic/quic_flags.cc
@@ -146,3 +146,7 @@ bool FLAGS_quic_drop_non_awaited_packets = false;
 
 // If true, use the fast implementation of IncrementalHash/FNV1a_128_Hash.
 bool FLAGS_quic_utils_use_fast_incremental_hash = true;
+
+// If true, require QUIC connections to use a valid server nonce or a non-local
+// strike register.
+bool FLAGS_require_strike_register_or_server_nonce = true;