Added more serializers

src/dorkbox/serializers/Inet4AddressSerializer.kt

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+package dorkbox.serializers
+
+import com.esotericsoftware.kryo.Kryo
+import com.esotericsoftware.kryo.Serializer
+import com.esotericsoftware.kryo.io.Input
+import com.esotericsoftware.kryo.io.Output
+import java.net.Inet4Address
+import java.net.InetAddress
+
+class Inet4AddressSerializer : Serializer<Inet4Address>() {
+
+    override fun write(kryo: Kryo, output: Output, inetAddress: Inet4Address) {
+        output.writeBytes(inetAddress.address)
+    }
+
+    override fun read(kryo: Kryo, input: Input, type: Class<out Inet4Address>): Inet4Address {
+        return InetAddress.getByAddress(null, input.readBytes(4)) as Inet4Address
+    }
+}

src/dorkbox/serializers/Inet6AddressSerializer.kt

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+package dorkbox.serializers
+
+import com.esotericsoftware.kryo.Kryo
+import com.esotericsoftware.kryo.Serializer
+import com.esotericsoftware.kryo.io.Input
+import com.esotericsoftware.kryo.io.Output
+import java.net.Inet6Address
+import java.net.InetAddress
+
+class Inet6AddressSerializer : Serializer<Inet6Address>() {
+
+    override fun write(kryo: Kryo, output: Output, inetAddress: Inet6Address) {
+        output.writeBytes(inetAddress.address) // 16 bytes
+    }
+
+    override fun read(kryo: Kryo, input: Input, type: Class<out Inet6Address>): Inet6Address {
+        return InetAddress.getByAddress(input.readBytes(16)) as Inet6Address
+    }
+}

src/dorkbox/serializers/ZoneIdSerializer.kt

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+package dorkbox.serializers
+
+import com.esotericsoftware.kryo.Kryo
+import com.esotericsoftware.kryo.Serializer
+import com.esotericsoftware.kryo.io.Input
+import com.esotericsoftware.kryo.io.Output
+import java.time.ZoneId
+
+class ZoneIdSerializer: Serializer<ZoneId>() {
+    override fun write(kryo: Kryo, output: Output, zoneId: ZoneId) {
+        output.writeString(zoneId.id)
+    }
+
+    override fun read(kryo: Kryo, input: Input, type: Class<out ZoneId>): ZoneId {
+        return ZoneId.of(input.readString())
+    }
+}