Michael Ben-Amiandmzbenami
618b606b46
Track lastSeen on each cached flow and add a sweeper goroutine that periodically removes flows idle past the idle timeout. Introduce tunables for idle timeout, maximum flows removed per sweep (to limit mutex hold time), and the sweeper interval. Also cap the previously-unlimited tables: 10k client flows, 100k connector flows. Updates tailscale/corp#38630 Signed-off-by: Michael Ben-Ami <mzb@tailscale.com>