Minor LWIPEthernet cleanup (#1906)

libraries/lwIP_Ethernet/src/LwipEthernet.cpp

@@ -32,7 +32,6 @@ bool __ethernetContextInitted = false;
 // Async context that pumps the ethernet controllers
 static async_context_threadsafe_background_t lwip_ethernet_async_context_threadsafe_background;
 static async_at_time_worker_t ethernet_timeout_worker;
-
 static async_context_t *_context = nullptr;
 
 // Theoretically support multiple interfaces
@@ -45,7 +44,7 @@ void ethernet_arch_lwip_begin() {
         return;
     }
 #endif
-    async_context_acquire_lock_blocking(&lwip_ethernet_async_context_threadsafe_background.core);
+    async_context_acquire_lock_blocking(_context);
 }
 
 void ethernet_arch_lwip_end() {
@@ -55,7 +54,7 @@ void ethernet_arch_lwip_end() {
         return;
     }
 #endif
-    async_context_release_lock(&lwip_ethernet_async_context_threadsafe_background.core);
+    async_context_release_lock(_context);
 }
 
 int __addEthernetPacketHandler(std::function<void(void)> _packetHandler) {

libraries/lwIP_Ethernet/src/LwipIntfDev.h

@@ -67,7 +67,7 @@ public:
                 const IPAddress& arg3 = IPADDR_NONE, const IPAddress& dns2 = IPADDR_NONE);
 
     // two and one parameter version. 2nd parameter is DNS like in Arduino. IPv4 only
-    boolean config(IPAddress local_ip, IPAddress dns = IPADDR_NONE);
+    bool config(IPAddress local_ip, IPAddress dns = IPADDR_NONE);
 
     // default mac-address is inferred from esp8266's STA interface
     bool begin(const uint8_t* macAddress = nullptr, const uint16_t mtu = DEFAULT_MTU);
@@ -271,7 +271,7 @@ bool LwipIntfDev<RawDev>::config(const IPAddress& localIP, const IPAddress& gate
 }
 
 template<class RawDev>
-boolean LwipIntfDev<RawDev>::config(IPAddress local_ip, IPAddress dns) {
+bool LwipIntfDev<RawDev>::config(IPAddress local_ip, IPAddress dns) {
 
     if (!local_ip.isSet()) {
         return config(INADDR_ANY, INADDR_ANY, INADDR_ANY);