parseProxyUrl = function( value ) {
	const re = /^https?:\/\//i;

	if ( value.length > 3 && ! re.test( value ) ) {
		value = `http://${ value }`;
	}

	return helper.removeEndSlashes( value );
}
Check to make sure proxy URLs have a protcol attached

@param  string value 	Proxy URL to check against
@return string       	The validated/modified proxy URL