Rename connection_id to server_connection_id

This is a step on the way to enabling client connection IDs. It will make the code less ambiguous once we introduce client_connection_id.

gfe-relnote: n/a, renaming code only
PiperOrigin-RevId: 249045070
Change-Id: Ia7ba75511f96c896bc6f0f4978dae2cd13e707fb
diff --git a/quic/quartc/quartc_dispatcher.cc b/quic/quartc/quartc_dispatcher.cc
index fd4f289..091d56b 100644
--- a/quic/quartc/quartc_dispatcher.cc
+++ b/quic/quartc/quartc_dispatcher.cc
@@ -39,7 +39,7 @@
   // Allow incoming packets to set our expected connection ID length.
   SetShouldUpdateExpectedConnectionIdLength(true);
   // Allow incoming packets with connection ID lengths shorter than allowed.
-  SetAllowShortInitialConnectionIds(true);
+  SetAllowShortInitialServerConnectionIds(true);
   // QuicDispatcher takes ownership of the writer.
   QuicDispatcher::InitializeWithWriter(packet_writer.release());
   // NB: This must happen *after* InitializeWithWriter.  It can call us back