#49 support for attribution lines

[Guido Neitzer]

For news and mailinglists we need attribution lines
like this:

---8<------8<------8<------8<------8<---

Guido Neitzer wrote on Sep, 11 2002:

> ...

---8<------8<------8<------8<------8<---

http://www.xs4all.nl/~js/gnksa/gnksa.txt says to this
topic:

"If it concerns a followup (as opposed to an e-mail
reply), the quoted text MUST be preceded by an
"attribution line" identifying the author of the text
that is being quoted. (The user may decide to delete
this attribution line or to configure it away, but it
MUST be there by default.)"