request on to the specified handler. A *match* stanza may
contain any number of *set* lines.
+*xset* 'HEADER' 'VALUE'::
+
+ *xset* does exactly the same thing as *set*, except the
+ 'HEADER' is automatically prepended with the `X-Ash-`
+ prefix. The intention is only to make configuration files
+ look nicer in this very common case.
+
*restpat* 'TEMPLATE'::
If the *match* stanza as a whole matches, 'TEMPLATE' is