Support for client certs in ssl_server_socket.

net/ssl/ssl_config.h

Index: net/ssl/ssl_config.h
diff --git a/net/ssl/ssl_config.h b/net/ssl/ssl_config.h
index c3dc9b9fef25ad6b27ec452a2327f14063499d59..3d2b3c7c52e5fc4b454d92a77bebad8d9ec12ecf 100644
--- a/net/ssl/ssl_config.h
+++ b/net/ssl/ssl_config.h
@@ -134,7 +134,9 @@ struct NET_EXPORT SSLConfig {
   // response to the user explicitly accepting the bad certificate.
   std::vector<CertAndStatus> allowed_bad_certs;
 
-  // True if we should send client_cert to the server.
+  // True if we should send client_cert to the server (when acting as client).
+  // When acting as server, overloaded to mean that we should request the client
+  // to send a cert.
   bool send_client_cert;
 
   bool verify_ev_cert;  // True if we should verify the certificate for EV.