internal/pkg: set User-Agent header

Avoid living under the default user agent and be at the mercy of some IDS.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/pkg/net.go

@@ -78,6 +78,7 @@ func (a *httpArtifact) Cure(r *RContext) (rc io.ReadCloser, err error) {
 	if err != nil {
 		return
 	}
+	req.Header.Set("User-Agent", "Hakurei/1.1")
 
 	var resp *http.Response
 	if resp, err = a.doFunc(req); err != nil {