Tests that need a lookup answer give it an hour (closes #119)

Twelve tests in internal/proxy needed the GeoJS stand-in to be asked or
to answer within the default SWWAF_LOOKUP_TIMEOUT of one second on the
real clock. A hold-up of the test process past it abandoned the request
to the stand-in, or left the client unknown. Each now sets
SWWAF_LOOKUP_TIMEOUT to an hour, and the comment on startGeoJS asks the
same of later tests.

Judgement call: set in each test, not as a default in newProxy, where it
would change two tests that rely on the default second.

Model: opus-5-5

internal/proxy/observe_test.go

@@ -39,6 +39,7 @@ func TestObserveModeForwardsWhatEnforceModeRefuses(t *testing.T) {
 
 			geojsURL, _ := startGeoJS(t)
 			env := map[string]string{
+				lookupTimeout:      "1h",
 				rateLimitPerMinute: "1",
 				denyNets:           denied,
 				deniedCountries:    "kp",