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tailscale/control
Brad Fitzpatrick 052602752f control/controlclient: make Observer optional
As a baby step towards eventbus-ifying controlclient, make the
Observer optional.

This also means callers that don't care (like this network lock test,
and some tests in other repos) can omit it, rather than passing in a
no-op one.

Updates #12639

Change-Id: Ibd776b45b4425c08db19405bc3172b238e87da4e
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
3 weeks ago
..
controlbase all: add Node.HomeDERP int, phase out "127.3.3.40:$region" hack [capver 111] 11 months ago
controlclient control/controlclient: make Observer optional 3 weeks ago
controlhttp feature/ace: make ACE modular 2 months ago
controlknobs control, ipn, tailcfg: enable seamless key renewal by default 3 months ago
ts2021 control/ts2021: fix data race during concurrent Close and conn ending 2 months ago