Build the url to get the config from a PXWEB api
# S3 method for url
build_pxweb_url(x)build_pxweb_config_url(x)
# S3 method for list
build_pxweb_config_url(x)
# S3 method for pxweb
build_pxweb_config_url(x)
# S3 method for url
build_pxweb_config_url(x)