Fix issue #693

Using MsgBase.get_all_msg_headers() which didn't exist when this module was
originally written.

Also, include "use strict";

Apparently some Gopher clients prepend a slash to all requests

Fix issue #688

The details (dates, author, revision numbers) are often stale and
misleading, so start removing them. Where the Revision tag was used
for a version/revision, just bump it by one and use a string constant
instead (Git doesn't provide any similar facility for auto-incrementing
revision numbers).

More remains. Perhaps a commit hook to alert me when committing that I should
clean up as I go rather than try to do this in bulk. <shrug>

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.

client.

in the database, doesn't give credits, etc. So it only supports "free" download
directories that guest/everyone has access to.

examples.

filtering by log level by sysop configuration.

global user object).

Using system.host_name instead of system.inetaddr for links.
Added support back in for debug output (with -d option).
Added ver, time, and stats documents (same as special finger requests).

sent.

Replaced most format() calls with concatenated strings (bug hunting).

No file download support (yet).