v1.2.0 to fix multiple-definitions linker error

### Releases v1.2.0

1. Fix `multiple-definitions` linker error and weird bug related to `src_cpp`. Check [Different behaviour using the src_cpp or src_h lib #80](khoih-prog/ESPAsync_WiFiManager#80)
2. Optimize library code by using `reference-passing` instead of `value-passing`
3. Update all examples

Author: khoih-prog

src/AsyncHTTPSRequest_Debug_Generic.h

@@ -0,0 +1,96 @@
+/****************************************************************************************************************************
+  AsyncHTTPSRequest_Debug_Generic.h
+  
+  For ESP32, ESP8266 and STM32 with built-in LAN8742A Ethernet (Nucleo-144, DISCOVERY, etc)
+  
+  AsyncHTTPSRequest is a library for the ESP8266, ESP32 and currently STM32 run built-in Ethernet WebServer
+  
+  Based on and modified from AsyncHTTPRequest Library (https://github.com/boblemaire/asyncHTTPrequest)
+  
+  Built by Khoi Hoang https://github.com/khoih-prog/AsyncHTTPSRequest_Generic
+  
+  Copyright (C) <2018>  <Bob Lemaire, IoTaWatt, Inc.>
+  This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License 
+  as published bythe Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+  You should have received a copy of the GNU General Public License along with this program.  If not, see <https://www.gnu.org/licenses/>.  
+ 
+  Version: 1.2.0
+  
+  Version Modified By   Date      Comments
+  ------- -----------  ---------- -----------
+  1.0.0    K Hoang     21/10/2021 Initial coding to support only ESP32
+  1.1.0    K Hoang     23/10/2021 Add support to ESP32-based WT32-ETH01 using LAN8720
+  1.1.1    K Hoang     29/11/2021 Auto detect ESP32 core version and improve connection time for WT32_ETH01
+  1.2.0    K Hoang     30/12/2021 Fix `multiple-definitions` linker error
+ *****************************************************************************************************************************/
+
+#pragma once
+
+#ifndef ASYNC_HTTPS_REQUEST_DEBUG_GENERIC_H
+#define ASYNC_HTTPS_REQUEST_DEBUG_GENERIC_H
+
+#ifdef ASYNC_HTTPS_DEBUG_PORT
+  #define A_DBG_PORT      ASYNC_HTTPS_DEBUG_PORT
+#else
+  #define A_DBG_PORT      Serial
+#endif
+
+// Change _ASYNC_HTTPS_LOGLEVEL_ to set tracing and logging verbosity
+// 0: DISABLED: no logging
+// 1: ERROR: errors
+// 2: WARN: errors and warnings
+// 3: INFO: errors, warnings and informational (default)
+// 4: DEBUG: errors, warnings, informational and debug
+
+#ifndef _ASYNC_HTTPS_LOGLEVEL_
+  #define _ASYNC_HTTPS_LOGLEVEL_       0
+#endif
+
+/////////////////////////////////////////////////////////
+
+const char AHTTPS_MARK[] = "[AHTTPS] ";
+
+#define AHTTPS_PRINT_MARK   AHTTPS_PRINT(AHTTPS_MARK)
+#define AHTTPS_PRINT_SP     A_DBG_PORT.print(" ")
+
+#define AHTTPS_PRINT        A_DBG_PORT.print
+#define AHTTPS_PRINTLN      A_DBG_PORT.println
+
+/////////////////////////////////////////////////////////
+
+#define AHTTPS_LOGERROR(x)         if(_ASYNC_HTTPS_LOGLEVEL_>0) { AHTTPS_PRINT_MARK; AHTTPS_PRINTLN(x); }
+#define AHTTPS_LOGERROR0(x)        if(_ASYNC_HTTPS_LOGLEVEL_>0) { AHTTPS_PRINT(x); }
+#define AHTTPS_LOGERROR1(x,y)      if(_ASYNC_HTTPS_LOGLEVEL_>0) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(y); }
+#define AHTTPS_LOGERROR2(x,y,z)    if(_ASYNC_HTTPS_LOGLEVEL_>0) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINT(y); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(z); }
+#define AHTTPS_LOGERROR3(x,y,z,w)  if(_ASYNC_HTTPS_LOGLEVEL_>0) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINT(y); AHTTPS_PRINT_SP; AHTTPS_PRINT(z); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(w); }
+
+/////////////////////////////////////////////////////////
+
+#define AHTTPS_LOGWARN(x)          if(_ASYNC_HTTPS_LOGLEVEL_>1) { AHTTPS_PRINT_MARK; AHTTPS_PRINTLN(x); }
+#define AHTTPS_LOGWARN0(x)         if(_ASYNC_HTTPS_LOGLEVEL_>1) { AHTTPS_PRINT(x); }
+#define AHTTPS_LOGWARN1(x,y)       if(_ASYNC_HTTPS_LOGLEVEL_>1) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(y); }
+#define AHTTPS_LOGWARN2(x,y,z)     if(_ASYNC_HTTPS_LOGLEVEL_>1) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINT(y); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(z); }
+#define AHTTPS_LOGWARN3(x,y,z,w)   if(_ASYNC_HTTPS_LOGLEVEL_>1) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINT(y); AHTTPS_PRINT_SP; AHTTPS_PRINT(z); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(w); }
+
+/////////////////////////////////////////////////////////
+
+#define AHTTPS_LOGINFO(x)          if(_ASYNC_HTTPS_LOGLEVEL_>2) { AHTTPS_PRINT_MARK; AHTTPS_PRINTLN(x); }
+#define AHTTPS_LOGINFO0(x)         if(_ASYNC_HTTPS_LOGLEVEL_>2) { AHTTPS_PRINT(x); }
+#define AHTTPS_LOGINFO1(x,y)       if(_ASYNC_HTTPS_LOGLEVEL_>2) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(y); }
+#define AHTTPS_LOGINFO2(x,y,z)     if(_ASYNC_HTTPS_LOGLEVEL_>2) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINT(y); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(z); }
+#define AHTTPS_LOGINFO3(x,y,z,w)   if(_ASYNC_HTTPS_LOGLEVEL_>2) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINT(y); AHTTPS_PRINT_SP; AHTTPS_PRINT(z); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(w); }
+
+/////////////////////////////////////////////////////////
+
+#define AHTTPS_LOGDEBUG(x)         if(_ASYNC_HTTPS_LOGLEVEL_>3) { AHTTPS_PRINT_MARK; AHTTPS_PRINTLN(x); }
+#define AHTTPS_LOGDEBUG0(x)        if(_ASYNC_HTTPS_LOGLEVEL_>3) { AHTTPS_PRINT(x); }
+#define AHTTPS_LOGDEBUG1(x,y)      if(_ASYNC_HTTPS_LOGLEVEL_>3) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(y); }
+#define AHTTPS_LOGDEBUG2(x,y,z)    if(_ASYNC_HTTPS_LOGLEVEL_>3) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINT(y); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(z); }
+#define AHTTPS_LOGDEBUG3(x,y,z,w)  if(_ASYNC_HTTPS_LOGLEVEL_>3) { AHTTPS_PRINT_MARK; AHTTPS_PRINT(x); AHTTPS_PRINT_SP; AHTTPS_PRINT(y); AHTTPS_PRINT_SP; AHTTPS_PRINT(z); AHTTPS_PRINT_SP; AHTTPS_PRINTLN(w); }
+
+/////////////////////////////////////////////////////////
+
+#endif    // ASYNC_HTTPS_REQUEST_DEBUG_GENERIC_H
+