Remove lazy vars in ProtocolStack

Sources/SwiftNetwork/Protocols/ProtocolStack.swift

@@ -489,11 +489,33 @@ public final class ProtocolStack: Hashable {
         #endif
     }
 
-    lazy var persistentApplication: Deque<ApplicationProtocol> = Deque<ApplicationProtocol>()
-    lazy var application: Deque<ApplicationProtocol> = Deque<ApplicationProtocol>()
-    public lazy var transport: TransportProtocol? = nil
+    private var _persistentApplication: Deque<ApplicationProtocol>?
+    var persistentApplication: Deque<ApplicationProtocol> {
+        get {
+            if _persistentApplication == nil {
+                _persistentApplication = Deque<ApplicationProtocol>()
+            }
+            return _persistentApplication!
+        }
+        set {
+            _persistentApplication = newValue
+        }
+    }
+    private var _application: Deque<ApplicationProtocol>?
+    var application: Deque<ApplicationProtocol> {
+        get {
+            if _application == nil {
+                _application = Deque<ApplicationProtocol>()
+            }
+            return _application!
+        }
+        set {
+            _application = newValue
+        }
+    }
+    public var transport: TransportProtocol? = nil
     public var internet: InternetProtocol? = nil
-    public lazy var link: LinkProtocol? = nil
+    public var link: LinkProtocol? = nil
 
     #if !NETWORK_EMBEDDED
     var internetOptions: AbstractProtocolOptions? {