tree 54773fb73892d36be9e210372e57e3362eb452d3
parent 67cb9df62453ee118720e1b5ba6aed93a601b62c
author QUICHE team <quiche-dev@google.com> 1553709737 -0700
committer Copybara-Service <copybara-worker@google.com> 1553709781 -0700

Enable GFE to run without QUIC ServerConfig private keys

This CL connects the remaining wires so that GFE can run with Leto as its only way of accessing ServerConfig private keys.  In the event that Leto is not accessible, GFE will send a REJ containing the fallback ServerConfig (which is unique to that GFE), allowing the handshake to complete at the cost of one additional round-trip to the client.

gfe-relnote: Allow GFE to serve QUIC without ServerConfig private keys present.  Protected by gfe2_restart_flag_dont_fetch_quic_private_keys_from_leto and gfe2_reloadable_flag_send_quic_fallback_server_config_on_leto_error.
PiperOrigin-RevId: 240599020
Change-Id: If396c55db617dfeb8c4f2362761a72711d05baa5