Showed MB how to use an FTP client on her Mac to edit the list of allowable netlink ids in a .htaccess file. Couldn't get filezilla to display hidden files, couldn't get cyberduck to open file in an external text editor (and of course cyberduck doesn't have a window for the local system, so the downloaded .htaccess file simply disappears in the standard Finder window), so used free version of Transmit.