optimized network paths for news 2.10.2

[Mark Horton]

The official distribution HAS had such a feature since 2.10, over
a year ago.  You just define INTERNET and replies use the From
line rather than the Path line.

If you have pathalias on your system, you probably have a mailer
that is capable of dealing with internet addresses, or can make it
happen trivially.

The Path line is not intended for replies, it's intended to keep
articles from looping around the network.  The fact that it's being
used for replies just means that people don't have routing software.