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

Ten tests in internal/proxy set a country list, a biased threshold or
SWWAF_ADD_LOOKUP_HEADERS, and expected the GeoJS stand-in's answer within
the default SWWAF_LOOKUP_TIMEOUT of one second on the real clock. A
hold-up of the test process past it 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/errorburst_test.go

@@ -194,6 +194,7 @@ func TestErrorBurstIsNotLoweredForAClientWithLowerLimits(t *testing.T) {
 
 	geojsURL, _ := startGeoJS(t)
 	s, _, server := startWithClock(t, geojsURL, map[string]string{
+		lookupTimeout:       "1h",
 		errorBurstThreshold: "2",
 		rulesDir:            writeRules(t, testRules),
 		countryLimitPercent: countryDEHalf,