"echoping" is a small program to test (approximatively) performances of a 
remote host by sending it TCP "echo" (or other protocol) packets.

- uses the protocols echo, discard, chargen or HTTP, 
- uses UDP instead of TCP for the protocols which accept it (like echo),
- can repeat the test and display various measures about it,
- can use T/TCP on systems which support it.

It's useful for checking that http servers are running and not wedged.

The reference site for echoping is:

ftp://ftp.pasteur.fr/pub/Network/echoping

Stephane Bortzmeyer <bortzmeyer@pasteur.fr>. October 1995 for the
first version. November 1996 for this one.