Fix for CVE-2021-30181 in apache/dubbo (project apache__incubator-dubbo_CVE-2021-30181_2.6.8), commit 9b7575aa1c949959c86d29c47625575b58a9dfa9
Fixed file: dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/script/ScriptRouter.java
Fixed class: ScriptRouter (lines 52-155)
Fixed method: getRule (lines 85-90)
Method signature: String getRule(URL)