make the token and control urls configurable #6

Job	Run time
cross (linux, arm64)	1m 26s
cross (linux, 386)	1m 13s
cross (linux, loong64)	1m 15s
cross (linux, arm, 5)	1m 11s
cross (linux, arm, 7)	2m 27s
cross (darwin, amd64)	1m 13s
privileged	51s
cross (darwin, arm64)	1m 21s
cross (windows, amd64)	1m 17s
race-build	4m 31s
cross (windows, arm64)	1m 6s
race-root-integration (1/4)	1m 19s
cross (freebsd, amd64)	1m 11s
race-root-integration (2/4)	1m 18s
cross (openbsd, amd64)	1m 12s
race-root-integration (3/4)	1m 18s
race-root-integration (4/4)	1m 17s
test (amd64, -coverprofile=/tmp/coverage.out)	3m 27s
windows	4m 42s
test (amd64, -race, 1/3)	3m 9s
test (amd64, -race, 2/3)	2m 57s
test (amd64, -race, 3/3)	3m 36s
test (386)	2m 11s
android	54s
crossmin (plan9, amd64)	15s
crossmin (aix, ppc64)	18s
depaware	31s
fuzz	7m 12s
go_generate	1m 1s
go_mod_tidy	26s
ios	47s
licenses	6s
staticcheck (linux, amd64)	3m 41s
tailscale_go	30s
staticcheck (windows, amd64)	3m 23s
vm	0s
wasm	6m 21s
staticcheck (darwin, amd64)	3m 31s
staticcheck (windows, 386)	3m 22s
notify_slack	1s
check_mergeability	1s
	1h 17m 48s

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