http://l3tczdiiwoo63iwxty4lhs6p7eaxop5micbn7vbliydgv63x5zrrrfyd.onion/user-manual/templates.html
Should you create your own custom templates, you should use the config setting templdir to specify an alternate location, so
your templates do not get overwritten during upgrades. Note that just like in configuration files, lines starting with # are ignored when the
templates are filled in. The place-holders are of the form @name@ , and you will find a list of available
symbols, which vary from template to template, in the comments at the start of each file.