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/rproxy/bodies.go

@@ -203,7 +203,8 @@ func (w *responseWriter) Write(p []byte) (int, error) {
 		w.status = http.StatusOK
 	}
 
-	n, err := w.ResponseWriter.Write(p) //nolint:gosec // the answer, as it was given
+	//nolint:gosec // the answer, as it was given
+	n, err := w.ResponseWriter.Write(p)
 	w.bytes += int64(n)
 
 	return n, err
@@ -218,7 +219,8 @@ func (w *responseWriter) FlushError() error {
 // Hijack takes over the connection to the visitor, which ReverseProxy does only
 // to pass on the app's 101 Switching Protocols: that is then the status sent.
 func (w *responseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
-	conn, buffered, err := http.NewResponseController(w.ResponseWriter).Hijack()
+	conn, buffered, err := http.NewResponseController(w.ResponseWriter).
+		Hijack()
 	if err == nil {
 		w.status = http.StatusSwitchingProtocols
 	}