reply.icn: Program to reply to news-articles or mail

This program creates the appropriate headers and attribution,
quotes a news or mail message, and uses system() calls to put the
user in an editor and then to mail the reply.  The default prefix
for quoted text is ` > '.

    usage: reply [prefix] < news-article or mail-item

If a smarthost is defined, Internet addresses are converted to bang
paths (name@site.domain -> site.domain!name).  The mail is routed
to a domained smarthost as address@smarthost.domain, otherwise to
smarthost!address.

The default editor can be overridden with the EDITOR environment variable.