优化

app/src/main/java/io/legado/app/help/source/RssSourceExtensions.kt

@@ -37,9 +37,13 @@ suspend fun RssSource.sortUrls(): List<Pair<String, String>> {
                     val name = sort.substringBefore("::")
                     val url = sort.substringAfter("::", "")
                     if (url.isNotEmpty()) {
+                        if (url.startsWith("{{")) {
+                            add(Pair(name, url))
+                        } else {
                             add(Pair(name, NetworkUtils.getAbsoluteURL(sourceUrl, url)))
                         }
                     }
+                }
                 if (isEmpty()) {
                     add(Pair("", sourceUrl))
                 }