Reorder and rename OTA error codes

Author: pennam

src/Arduino_ESP32_OTA.cpp

@@ -136,13 +136,13 @@ int Arduino_ESP32_OTA::download(const char * ota_url)
     port = 443;
   } else {
     DEBUG_ERROR("%s: Failed to parse OTA URL %s", __FUNCTION__, ota_url);
-    return static_cast<int>(Error::UrlParseError);
+    return static_cast<int>(Error::UrlParse);
   }
 
   if (!_client->connect(url.host_.c_str(), port))
   {
     DEBUG_ERROR("%s: Connection failure with OTA storage server %s", __FUNCTION__, url.host_.c_str());
-    return static_cast<int>(Error::ServerConnectError);
+    return static_cast<int>(Error::ServerConnect);
   }
 
   _client->println(String("GET ") + url.path_.c_str() + " HTTP/1.1");
@@ -172,7 +172,7 @@ int Arduino_ESP32_OTA::download(const char * ota_url)
   if (!is_header_complete)
   {
     DEBUG_ERROR("%s: Error receiving HTTP header %s", __FUNCTION__, is_http_header_timeout ? "(timeout)":"");
-    return static_cast<int>(Error::HttpHeaderError);
+    return static_cast<int>(Error::HttpHeader);
   }
 
   /* Check HTTP response status code */

src/Arduino_ESP32_OTA.h

@@ -63,17 +63,17 @@ class Arduino_ESP32_OTA
     None                 =  0,
     NoOtaStorage         = -2,
     OtaStorageInit       = -3,
-    OtaStorageEnd        = -4,
-    UrlParseError        = -5,
-    ServerConnectError   = -6,
-    HttpHeaderError      = -7,
+    OtaHeaderLength      = -5,
+    OtaHeaderCrc         = -6,
+    OtaHeaterMagicNumber = -7,
     ParseHttpHeader      = -8,
-    OtaHeaderLength      = -9,
-    OtaHeaderCrc         = -10,
-    OtaHeaterMagicNumber = -11,
+    UrlParse             = -9,
+    ServerConnect        = -10,
+    HttpHeader           = -11,
     OtaDownload          = -12,
     OtaHeaderTimeout     = -13,
-    HttpResponse         = -14
+    HttpResponse         = -14,
+    OtaStorageEnd        = -15,
   };
 
            Arduino_ESP32_OTA();