Merge pull request #2344 in ITERATE/cyberduck from feature/gmxcloud t…

…o master

* commit '00ff33265100785e567827af4098c05c19a51d39':
  Add help option to connection profile.
  Add special case to handle quota failures.
  Add check for URL in identifier.
  Add module with custom quota implementation.
  Add special case to handle quota failures.
  Add quota type.
  Implement equals.
  Define unknown quota.

GMX Cloud.cyberduckprofile

@@ -3,7 +3,7 @@
 <plist version="1.0">
 <dict>
     <key>Protocol</key>
-    <string>davs</string>
+    <string>gmxcloud</string>
     <key>Vendor</key>
     <string>gmx</string>
     <key>Description</key>
@@ -12,5 +12,7 @@
     <string>webdav.mc.gmx.net</string>
     <key>Username Placeholder</key>
     <string>GMX Kundennummer</string>
+    <key>Help</key>
+    <string>https://www.gmx.net/produkte/cloud/speicher-erweitern/</string>
 </dict>
 </plist>