
Add support for TS_APPC_* variables to supply arguments by switching to https://github.com/peterbourgon/ff for CLI flag parsing. For example: TS_APPC_FORWARDS=tcp/22/github.com ./sniproxy Updates https://github.com/tailscale/tailscale/issues/1748 Signed-off-by: Denton Gentry <dgentry@tailscale.com>