logtail: don't send a User-Agent
Just useless bytes on the wire. Especially with HTTP/1.
@@ -295,6 +295,7 @@ func (l *logger) upload(ctx context.Context, body []byte) (uploaded bool, err er
if l.zstdEncoder != nil {
req.Header.Add("Content-Encoding", "zstd")
}
+ req.Header["User-Agent"] = nil // not worth writing one; save some bytes
maxUploadTime := 45 * time.Second
ctx, cancel := context.WithTimeout(ctx, maxUploadTime)
