Format Go with gofmt, then golines -m 77 (closes #215)

script/fmt now runs golines -m 77 after gofmt, repeating golines until
it changes nothing, since one pass can leave a line the next splits.
script/fmt-check fails when either would change a file.
script/bootstrap installs golines v0.13.0 with go install, pinned to
its commit, and checks the installed version with go version -m.

The tree is reformatted. The longer lines this makes are fixed by
hand: nolint directives moved onto their own line above the statement,
one string split, and 20 functions over funlen's 80 lines shortened or
split, RunWAF and limitPercentages among them.

Model: opus-5-5

internal/metrics/busiest.go

@@ -41,9 +41,11 @@ type busiest struct {
 // for the topN busiest countries.
 func newCountries(topN int) *busiest {
 	countries := newBusiest(topN, "country", "the client's country")
-	countries.refused = counterVec("sww_country_list_refusals_total",
+	countries.refused = counterVec(
+		"sww_country_list_refusals_total",
 		"Requests SWW_EXCLUSIVELY_ALLOWED_COUNTRIES refused, by the client's country.",
-		[]string{"country"})
+		[]string{"country"},
+	)
 
 	return countries
 }
@@ -90,7 +92,11 @@ func (b *busiest) Collect(ch chan<- prometheus.Metric) {
 // vecs returns the metrics: by AS number, those of requests and bytes; by
 // country, the refusals by the country list as well.
 func (b *busiest) vecs() []*prometheus.CounterVec {
-	vecs := []*prometheus.CounterVec{b.requests, b.requestBytes, b.responseBytes}
+	vecs := []*prometheus.CounterVec{
+		b.requests,
+		b.requestBytes,
+		b.responseBytes,
+	}
 	if b.refused != nil {
 		vecs = append(vecs, b.refused)
 	}