tree 8dbf86d8cdcadc287b7750d1c02b3744d94add35
parent cf1588207faa6771333052330846acd0c45a045c
author fayang <fayang@google.com> 1646154332 -0800
committer Copybara-Service <copybara-worker@google.com> 1646154449 -0800

Default enable PTO with configuration:
1) Send 1 packet per PTO with skipped packet number.
2) Arm the 1st PTO based on the earliest in flight sent time while making sure at least 1.5 * srtt has passed since the last in flight packet.
3) PTO delay = srtt + 2 * rttvar + ack_delay.

Please note, this should only affect gQUIC while IETF QUIC has been using PTO with this configuration.

Also cleanup experiment connection options: 2PTO, 1PTO, PTOS, PTOA, PEB1, PEB2, PVS1, PAG1, PAG2, PLE1, PLE2, APTO, PSDA.

Protected by FLAGS_quic_restart_flag_quic_default_on_pto2.

PiperOrigin-RevId: 431699930