Ensure hosts results are used

Fixes #2412.

Author: Mygod

core/src/main/java/com/github/shadowsocks/net/HostsFile.kt

@@ -21,8 +21,6 @@
 package com.github.shadowsocks.net
 
 import com.github.shadowsocks.utils.parseNumericAddress
-import java.net.Inet4Address
-import java.net.Inet6Address
 import java.net.InetAddress
 
 class HostsFile(input: String = "") {
@@ -36,9 +34,5 @@ class HostsFile(input: String = "") {
     }
 
     val configuredHostnames get() = map.size
-    fun resolve(hostname: String, isIpv6: Boolean): List<InetAddress> {
-        return (map[hostname] ?: return emptyList()).run {
-            if (isIpv6) filterIsInstance<Inet6Address>() else filterIsInstance<Inet4Address>()
-        }.shuffled()
-    }
+    fun resolve(hostname: String) = map[hostname] ?: emptyList<InetAddress>()
 }

core/src/main/java/com/github/shadowsocks/net/LocalDnsServer.kt

@@ -124,10 +124,12 @@ class LocalDnsServer(private val localResolver: suspend (String) -> Array<InetAd
                     else -> return@supervisorScope remote.await()
                 }
                 val host = question.name.canonicalize().toString(true)
-                val hostsResults = hosts.resolve(host, isIpv6)
+                val hostsResults = hosts.resolve(host)
                 if (hostsResults.isNotEmpty()) {
                     remote.cancel()
-                    return@supervisorScope cookDnsResponse(request, hostsResults)
+                    return@supervisorScope cookDnsResponse(request, hostsResults.run {
+                        if (isIpv6) filterIsInstance<Inet6Address>() else filterIsInstance<Inet4Address>()
+                    }.shuffled())
                 }
                 val acl = acl?.await() ?: return@supervisorScope remote.await()
                 val useLocal = when (acl.shouldBypass(host)) {