Return a list of supported protocols.

    :param profile: The profile key
    :type  profile: ``str``

    :param libcloud_kwargs: Extra arguments for the driver's list_protocols method
    :type  libcloud_kwargs: ``dict``

    :return: a list of supported protocols
    :rtype: ``list`` of ``str``

    CLI Example:

    .. code-block:: bash

        salt myminion libcloud_storage.list_protocols profile1

def list_protocols(profile, **libcloud_kwargs):
    '''
    Return a list of supported protocols.

    :param profile: The profile key
    :type  profile: ``str``

    :param libcloud_kwargs: Extra arguments for the driver's list_protocols method
    :type  libcloud_kwargs: ``dict``

    :return: a list of supported protocols
    :rtype: ``list`` of ``str``

    CLI Example:

    .. code-block:: bash

        salt myminion libcloud_storage.list_protocols profile1
    '''
    conn = _get_driver(profile=profile)
    libcloud_kwargs = salt.utils.args.clean_kwargs(**libcloud_kwargs)
    return conn.list_protocols(**libcloud_kwargs)