Commit c95311d1 added support for multiple config formats in addition to
pre-processing using Go's built-in templating system. The
`html/template` package is equivalent to `text/template`, except that
the former automatically escapes characters for inclusion in HTML.
Configurations aren't plain text, but they're also certainly no HTML.
The difference between the packages is noticeable when using `printf
"%q"` for quoting of strings. An example from the included unittest:
* `html/template`: `key = "with space"`
* `text/template`: `key = "with space"`
Signed-off-by: Michael Hanselmann <public@hansmi.ch>
