no more Subject: prefix

FYI, I've removed the "[Tugindia] " prefix from the Subject: header for
this mailing list's messages. It's necessary because of draconian rules
imposed by Apple, Microsoft, Yahoo, etc.

The List-Id: header identifies the mailing list for purposes of
filtering messages, etc. I know that is less convenient, but that's life.

This has already been done on a number of lists, and over the next few
days I'll do it on the remaining tug lists. -karl