fix rewriter crashes (this code is bad)

src/shared/rewriters/html.ts

@@ -81,6 +81,7 @@ function traverseParsedHtml(node, origin?: URL) {
 			node.attribs.content.includes("url")
 		) {
 			const contentArray = node.attribs.content.split("url=");
+			if (contentArray[1])
 				contentArray[1] = encodeUrl(contentArray[1].trim(), origin);
 			node.attribs.content = contentArray.join("url=");
 		}

src/worker/index.ts

@@ -70,6 +70,7 @@ self.ScramjetServiceWorker = class ScramjetServiceWorker {
 				let cookieParsed = cookie.split(";").map((x) => x.trim().split("="));
 
 				let [key, value] = cookieParsed.shift();
+				if (!value) continue;
 				value = value.replace("\"", "");
 
 				const hostArg = cookieParsed.find((x) => x[0] === "Domain");