Bring the information in the "sendmail and UUCP" question and answer in
sync with reality:

• all sendmail configuration files live in /etc/mail now
• `nodns' is not a valid option anymore
• the syntax of sendmail -bt has changed

While I'm here, put a full stop at the end of a sentence, put in a
simpler example of a mailertale, and use example.com as hostname
for the sendmail -bt stuff.

Original problem noticed by Jim Graham on -doc