Close JS5 connection if an invalid file is requested

This mimics the behaviour of the OSRS server.

Signed-off-by: Graham <gpe@openrs2.org>

game/src/main/kotlin/org/openrs2/game/net/js5/Js5Service.kt

@@ -12,6 +12,7 @@ import org.openrs2.cache.VersionTrailer
 import org.openrs2.protocol.js5.Js5Request
 import org.openrs2.protocol.js5.Js5Response
 import org.openrs2.util.collect.UniqueQueue
+import java.io.FileNotFoundException
 import javax.inject.Inject
 import javax.inject.Singleton
 
@@ -66,6 +67,7 @@ public class Js5Service @Inject constructor(
                 }
             }
         } else {
+            try {
                 store.read(request.archive, request.group).use { buf ->
                     if (request.archive != Js5Archive.ARCHIVESET) {
                         VersionTrailer.strip(buf)
@@ -73,6 +75,10 @@ public class Js5Service @Inject constructor(
 
                     buf.retain()
                 }
+            } catch (ex: FileNotFoundException) {
+                ctx.close()
+                return
+            }
         }
 
         val response = Js5Response(request.prefetch, request.archive, request.group, buf)