referer-check checks the wrong way

ImageServer.kt

if (request.header("Referer")?.startsWith("https://mangadex.org") == true) {
            snapshot?.close()
            Response(Status.FORBIDDEN)

so if the referer starts with mangadex we will send forbidden ...

I suppose it should be if (request.header("Referer")?.startsWith("https://mangadex.org") == false) {

So it's now either

• null -> don't evaluate the Referer
• mangadex -> work
• not mangadex -> "There is an error in your image"-Error