Made ESP8266WebServer::client() return a reference (fixes esp8266#7075) (esp8266#7080)

Author: bblanchon

libraries/ESP8266WebServer/README.rst

@@ -154,7 +154,7 @@ Other Function Calls
 
   const String & uri(); // get the current uri
   HTTPMethod  method(); // get the current method 
-  WiFiClient client(); // get the current client
+  WiFiClient & client(); // get the current client
   HTTPUpload & upload(); // get the current upload
   void setContentLength(); // set content length
   void sendHeader(); // send HTTP header

libraries/ESP8266WebServer/src/ESP8266WebServer.h

@@ -103,7 +103,7 @@ class ESP8266WebServerTemplate
 
   const String& uri() const { return _currentUri; }
   HTTPMethod method() const { return _currentMethod; }
-  ClientType client() { return _currentClient; }
+  ClientType& client() { return _currentClient; }
   HTTPUpload& upload() { return *_currentUpload; }
 
   // Allows setting server options (i.e. SSL keys) by the instantiator