Changeset 2319085

Fixed regular expression that formats a Luminate servlet host so that it works with PHP 7.3

PHP 7.3 is pickier than ever about regexes and always sees the - character as denoting a range, which in this case causes an error and causes the servlet URL / domain not to save when the user edits the plugin settings. Moving the - to the end of the character class clues PHP in to the fact that we aren’t trying to test for a range between \w and \..