The formatting program tools which are included by default are:

* sfeed_atom:   format (back to) an Atom feed.
* sfeed_frames: format to a HTML file with oldschool <frames>.
* sfeed_gopher: format to raw Gopher output.
* sfeed_html:   format to a single HTML page with optional CSS.
* sfeed_mbox:   format to mbox: useful for mail processing.
* sfeed_plain:  format to a plain-text UTF-8 listing.
* sfeed_twtxt:  format to a plain-text twtxt feed.

... writing a custom format program or script should be very easy.

When multiple file arguments are used (instead of stdin) then multiple files
are read and the output is structured for multiple feeds.

For example:

	sfeed_frames ~/.sfeed/feeds/*
	sfeed_html ~/.sfeed/feeds/*
	sfeed_gopher ~/.sfeed/feeds/*

This will create an additional index menu or sidebar for feeds showing the new
and total items for some of the tools.
