Handle configured proxies

    .. code-block:: yaml

        beacons:
          salt_proxy:
            - proxies:
                p8000: {}
                p8001: {}

def beacon(config):
    '''
    Handle configured proxies

    .. code-block:: yaml

        beacons:
          salt_proxy:
            - proxies:
                p8000: {}
                p8001: {}
    '''
    log.trace('salt proxy beacon called')

    _config = {}
    list(map(_config.update, config))

    return _run_proxy_processes(_config['proxies'])