Bug 121546 Cannot validate Javadoc URL starting with https
3.2 M4 On the Javadoc location properties page is possible to define a Javadoc URL. There is also a button to validate the specified location. If the URL starts with https a message pops up saying "Unable to validate location". Is this by design or is https not supported?
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavadocConfigurationBlock.java
FileDialog dialog= new FileDialog(fShell, SWT.OPEN);
		dialog.setFilterExtensions(new String[] { FILE_IMPORT_MASK });
		dialog.setText(PreferencesMessages.JavadocConfigurationBlock_zipImportSource_title);
		dialog.setFilterPath(currPath.toOSString());
		return dialog.open();
	}
	
	/**
	 * Display an error dialog with the specified message.
	 *
	 * @param message the error message
	 */
	protected void displayErrorDialog(String message) {
		MessageDialog.openError(fShell, ERROR_DIALOG_TITLE, message); 
	}
		
	private String chooseJavaDocFolder() {
		String initPath= ""; 
		if (fURLResult != null && "file".equals(fURLResult.getProtocol())) { 
			initPath= (new File(fURLResult.getFile())).getPath();
		}
		DirectoryDialog dialog= new DirectoryDialog(fShell);
		dialog.setText(PreferencesMessages.JavadocConfigurationBlock_javadocFolderDialog_label); 
		dialog.setMessage(PreferencesMessages.JavadocConfigurationBlock_javadocFolderDialog_message); 
		dialog.setFilterPath(initPath);
		String result= dialog.open();
		if (result != null) {
			try {
				URL url= new File(result).toURL();
				return url.toExternalForm();