Ask commentwrap to ignore lines that contain HTTP URIs.
Wrapping URLs is not useful and makes them not clicky in editors.

---
diff --git a/commentwrap.go b/commentwrap.go
index a1e8c00..5491064 100644
--- a/commentwrap.go
+++ b/commentwrap.go
@@ -86,6 +86,10 @@ func mustFlow(g *ast.CommentGroup, limit int) bool {
 		if strings.HasPrefix(comment.Text, "/*") {
 			return false
 		}
+		// Ignore lines that are URIs.
+		if isURI(comment.Text) {
+			continue
+		}
 		if len(comment.Text) > limit {
 			exceed = true
 		}
@@ -156,6 +160,11 @@ func isDirective(line string) bool {
 	return strings.HasPrefix(line, "go:") || strings.HasPrefix(line, "line:")
 }
 
+// isURI returns true if the line contains an HTTP URI.
+func isURI(line string) bool {
+	return strings.Contains(line, "http://") || strings.Contains(line, "https://")
+}
+
 var notes = []string{"TODO", "BUG", "FIXME", "OPTIMIZE"}
 
 // isNote returns true if the unescaped comment is a note: TODO, BUG, FIXME, OPTIMIZE.