connect-ip and connect-udp: percent encode * to %2A

Implement the fix for this errata:
https://errata.rfc-editor.org/eid8444/
And the corresponding spec change that went into connect-udp-bind

Also remove the connect-ip-version header leftover from before RFC publication

PiperOrigin-RevId: 1019616444

quiche/quic/masque/masque_client_session.cc

diff --git a/quiche/quic/masque/masque_client_session.cc b/quiche/quic/masque/masque_client_session.cc
index 5eea086..20272dc 100644
--- a/quiche/quic/masque/masque_client_session.cc
+++ b/quiche/quic/masque/masque_client_session.cc
@@ -114,8 +114,8 @@
   std::string target_host, target_port;
 
   if (IsBind()) {
-    target_host = "*";
-    target_port = "*";
+    target_host = "%2A";
+    target_port = "%2A";
   } else {
     auto it =
         fake_addresses_.find(target_server_address.host().ToPackedString());
@@ -252,7 +252,7 @@
   QuicUrl url(uri_template_);
   std::string scheme = url.scheme();
   std::string authority = url.HostPort();
-  std::string path = "/.well-known/masque/ip/*/*/";
+  std::string path = "/.well-known/masque/ip/%2A/%2A/";
 
   QUIC_DLOG(INFO) << "Sending CONNECT-IP request on stream " << stream->id()
                   << " scheme=\"" << scheme << "\" authority=\"" << authority
@@ -265,7 +265,6 @@
   headers[":scheme"] = scheme;
   headers[":authority"] = authority;
   headers[":path"] = path;
-  headers["connect-ip-version"] = "3";
   AddAdditionalHeaders(headers, url);
   QUIC_DVLOG(1) << "Sending request headers: " << headers.DebugString();
   size_t bytes_sent =

quiche/quic/masque/masque_server_session.cc

diff --git a/quiche/quic/masque/masque_server_session.cc b/quiche/quic/masque/masque_server_session.cc
index cf41c36..5094f47 100644
--- a/quiche/quic/masque/masque_server_session.cc
+++ b/quiche/quic/masque/masque_server_session.cc
@@ -598,7 +598,7 @@
   }
 
   QuicSocketAddress target_server_address;
-  if (has_bind_header && host == "*" && port == "*") {
+  if (has_bind_header && host == "%2A" && port == "%2A") {
     // This is a valid connect-udp-bind request.
     target_server_address = QuicSocketAddress();
   } else if (has_bind_header) {
@@ -610,7 +610,7 @@
         absl::StrCat(
             "Bad value for target when connect-udp-bind is present: host:",
             host.value(), " port: ", port.value()));
-  } else if (host == "*" || port == "*") {
+  } else if (host == "%2A" || port == "%2A") {
     // Error.
     QUIC_DLOG(ERROR)
         << "Bad value for target when connect-udp-bind is absent: host:"