tarball: correctly sort timestamps before Sep 2001 aka (time_t)1000000000
tarball: ignore freshly created _attributes for timestamping
scrape-reddit-comment: all hail .json
scrape-reddit-comment: remove no longer used code
hi: match ChanServ better
Revert "scrape-reddit-comment: remove no longer used code"

This reverts commit 843832501de9f78bd34ea464295d789469c9820f.
Revert "scrape-reddit-comment: all hail .json"

The JSON makes it fairly difficult to distinguish between self-post
replies and comment replies. That is, a .json of a self-post will
include the post itself & the first comment. But the .json of any other
comment will include the post itself & the requested comment, so
everything is in the same format.

This reverts commit 9ca4ed1af3b5ed431e80471853d5a76c0b9732d4.
babyl2mbox: output dummy mail address in the From_ line

Sometimes $from has "Real Name <email>" which is invalid here.
babyl2mbox: deal with dates like "Fri,  3 Jan 1997 14:36:46 -0500 (EST)"