[Avcheck] Administrativia: list.corpit.ru => corpit.ru change

[Michael Tokarev]

I was forced to upgrade Python yesterday due to some software
required never version of it when was available on Debian stable.
So this broke mailman in some ugly ways... and I descided to
upgrade it too, to version available for Debian-testing.  The
whole thing seems to be working fine now (this message will
show whenever it really works or not).

Also, I'm changing the list address from avcheck at list.corpit.ru
to avcheck at corpit.ru.  I don't know why I ever used "list."
part in the first place... maybe you know, Ralf? ;)  Old
address will work for several more months.  You may want to
adjust your mail sorting filters.

/mjt