Config tweaking.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

WireGuard/Coordinators/AppCoordinator.swift

@@ -233,10 +233,6 @@ extension AppCoordinator: TunnelConfigurationTableViewControllerDelegate {
         let protocolConfiguration = NETunnelProviderProtocol()
         protocolConfiguration.providerBundleIdentifier = VPNBUNDLE
         protocolConfiguration.serverAddress = (tunnel.peers?.array as? [Peer])?.compactMap { $0.endpoint}.joined(separator: ", ")
-        //TODO obtain endpoint username
-        //            protocolConfiguration.username = endpoint.username
-        //TODO: how to obtain this?
-        //            protocolConfiguration.passwordReference = try? keychain.passwordReference(for: endpoint.username)
         protocolConfiguration.providerConfiguration = tunnel.generateProviderConfiguration()
 
         manager.protocolConfiguration = protocolConfiguration

WireGuard/Models/Tunnel+Extension.swift

@@ -17,7 +17,7 @@ extension Tunnel {
         providerConfiguration[PCKeys.endpoints.rawValue] = peers?.array.compactMap {($0 as? Peer)?.endpoint}.joined(separator: ", ")
         providerConfiguration[PCKeys.dns.rawValue] = interface?.dns
         providerConfiguration[PCKeys.addresses.rawValue] = interface?.addresses
-        if let mtu = interface?.mtu {
+        if let mtu = interface?.mtu, mtu > 0 {
             providerConfiguration[PCKeys.mtu.rawValue] = NSNumber(value: mtu)
         }