Fix compilation issue and comments.

Signed-off-by: Marc Barry <4965634+marc-barry@users.noreply.github.com>

source/extensions/filters/common/ext_authz/check_request_utils.cc

@@ -254,7 +254,7 @@ void CheckRequestUtils::createHttpCheck(
     if (cb->connection()->ssl() != nullptr) {
       setTLSSession(*attrs->mutable_tls_session(), cb->connection()->ssl());
     } else if (!cb->connection()->requestedServerName().empty()) {
-      std::string sni{b->connection()->requestedServerName()};
+      std::string sni{cb->connection()->requestedServerName()};
       attrs->mutable_tls_session()->set_sni(sni);
     }
   }
@@ -280,13 +280,13 @@ void CheckRequestUtils::createTcpCheck(
   setAttrContextPeer(*attrs->mutable_destination(), cb->connection(), server_name, true,
                      include_peer_certificate);
 
-  // Try to get the SNI from the TLS session. If not available there then try the
-  // data from the TLS inspector (i.e. the server name)
   if (include_tls_session) {
+    // Try to get the SNI from the TLS session. If not available there then try the
+    // data from the TLS inspector (i.e. the server name)
     if (cb->connection()->ssl() != nullptr) {
       setTLSSession(*attrs->mutable_tls_session(), cb->connection()->ssl());
     } else if (!cb->connection()->requestedServerName().empty()) {
-      std::string sni{b->connection()->requestedServerName()};
+      std::string sni{cb->connection()->requestedServerName()};
       attrs->mutable_tls_session()->set_sni(sni);
     }
   }