Add fallback support for different names of Shadowsocks plugins

Fix compatibility problem with some non-standard v2rayN subscription.
Fix running program from directory other than program folder may cause not using pref.yml as default.
Optimize codes.

src/speedtestutil.cpp

@@ -85,6 +85,7 @@ void explodeVmess(std::string vmess, const std::string &custom_port, nodeInfo &n
         break;
     }
 
+    add = trim(add);
     node.linkType = SPEEDTEST_MESSAGE_FOUNDVMESS;
     node.group = V2RAY_DEFAULT_GROUP;
     node.remarks = ps;