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Ignore 64-bit time_t warnings in PVS-Studio
Regenerate with protobuf-c 1.5.2
Allow multiple accept/reject messages during a logsrv conversation. The log server now advertises a subcommands flag if it supports logging subcommands (e.g. commands run from a sudo-spawned program like a shell). The client should only log additional commands during a session if this flag is set in the ServerHello message.