Adding some documentation to the Custom Header Key

Author: George Villasboas

Sources/OAuth2Client/NXOAuth2AccountStore.h

@@ -35,7 +35,6 @@ extern NSString * const kNXOAuth2AccountStoreConfigurationRedirectURL;
 extern NSString * const kNXOAuth2AccountStoreConfigurationScope;
 extern NSString * const kNXOAuth2AccountStoreConfigurationTokenType;
 extern NSString * const kNXOAuth2AccountStoreConfigurationTokenRequestHTTPMethod;
-extern NSString * const kNXOAuth2AccountStoreConfigurationCustomHeaderFields;
 
 /* 
  * Requires a NSDictionary as a value.
@@ -45,6 +44,13 @@ extern NSString * const kNXOAuth2AccountStoreConfigurationCustomHeaderFields;
  */
 extern NSString * const kNXOAuth2AccountStoreConfigurationAdditionalAuthenticationParameters;
 
+/*
+ * Requires a NSDictionary as a value.
+ * They are passed onto the HTTP Header Fields request as additional parameters.
+ * Example of a valid setup: @{ @"Content-type" : @"application/x-www-form-urlencoded" }
+ */
+extern NSString * const kNXOAuth2AccountStoreConfigurationCustomHeaderFields;
+
 
 #pragma mark Account Type
 

Sources/OAuth2Client/NXOAuth2Client.m

@@ -407,7 +407,9 @@ - (void)authenticateWithUsername:(NSString *)username password:(NSString *)passw
     }
 
     if (self.customHeaderFields) {
-        [tokenRequest setAllHTTPHeaderFields:self.customHeaderFields];
+        [self.customHeaderFields enumerateKeysAndObjectsUsingBlock:^(NSString *key, NSString *obj, BOOL *stop) {
+            [tokenRequest addValue:obj forHTTPHeaderField:key];
+        }];
     }
 
     authConnection = [[NXOAuth2Connection alloc] initWithRequest:tokenRequest