[DNS] Fix hostByName returning negative values when lookup failed

`hostByName` does only return `1` on success, however it may return a negative value when lookup failed.
So need to check for the exact return value and not consider it a boolean return type.

lib/ESPping/src/ESPping.cpp

@@ -72,7 +72,7 @@ bool PingClass::ping(IPAddress dest, int16_t count) {
 bool PingClass::ping(const char* host, int16_t count) {
     IPAddress remote_addr;
 
-    if (WiFi.hostByName(host, remote_addr))
+    if (WiFi.hostByName(host, remote_addr) == 1)
         return ping(remote_addr, count);
 
     return false;

lib/HttpClientLight/src/HttpClientLight.cpp

@@ -1173,7 +1173,7 @@ bool HTTPClientLight::connect(void)
     } else {
         IPAddress remote_addr;
         // Add include "ESP8266WiFi.h" for this to work
-        if (!WiFi.hostByName(_host.c_str(), remote_addr)) {
+        if (Network.hostByName(_host.c_str(), remote_addr) != 1) {
             return false;
         }
         if(!_client->connect(remote_addr, _port, _connectTimeout)) {

lib/lib_ssl/tls_mini/src/WiFiClientSecureLightBearSSL.cpp

@@ -335,7 +335,7 @@ int WiFiClientSecure_light::connect(const char* name, uint16_t port, int32_t tim
   DEBUG_BSSL("connect(%s,%d)\n", name, port);
   IPAddress remote_addr;
   clearLastError();
-  if (!WiFi.hostByName(name, remote_addr)) {
+  if (Network.hostByName(name, remote_addr) != 1) {
     DEBUG_BSSL("connect: Name loopup failure\n");
     setLastError(ERR_CANT_RESOLVE_IP);
     return 0;