Fix logic error in connection pooling

app/build.gradle

@@ -124,7 +124,7 @@ dependencies {
 
     implementation 'com.frostnerd.utilskt:preferences:1.5.17' // https://git.frostnerd.com/AndroidUtils/preferenceskt
     implementation 'com.frostnerd.utilskt:navigationdraweractivity:1.3.29' // https://git.frostnerd.com/AndroidUtils/navigationdraweractivity
-    implementation 'com.frostnerd.utilskt:encrypteddnstunnelproxy:1.5.182' // https://git.frostnerd.com/AndroidUtils/encrypteddnstunnelproxy
+    implementation 'com.frostnerd.utilskt:encrypteddnstunnelproxy:1.5.183' // https://git.frostnerd.com/AndroidUtils/encrypteddnstunnelproxy
     implementation 'com.frostnerd.utilskt:general:1.0.19' // https://git.frostnerd.com/AndroidUtils/generalkt
     implementation 'com.frostnerd.utilskt:adapters:1.1.6' // https://git.frostnerd.com/AndroidUtils/Adapters
 

app/src/main/java/com/frostnerd/smokescreen/util/speedtest/DnsSpeedTest.kt

@@ -68,7 +68,7 @@ class DnsSpeedTest(val server: DnsServerInformation<*>,
         private val sslSocketFactory = SSLSocketFactory.getDefault()
 
         override fun validate(t: Socket): Boolean {
-            return !t.isConnected
+            return t.isClosed || !t.isConnected
         }
 
         override fun destroy(t: Socket) {