Added section headers to the main directory listing; the
meaning of each directory entry was unclear. (These use
the non-standard but commonly-used item type 'i'.)
Should satisfy issue #67.
https://gitlab.synchro.net/sbbs/sbbs/-/issues/67
This one's for all you folks who have QWK bulletins on your
systems and want people to be able to read them via Gopher.