Own gnus-thread-score-function: If any followup have positive score assign
greater available score to thread, else assign lesser available score.
;; -*- mode: emacs-lisp -*-
(
("from"
("Oleksandr Gavenko" 200))
("from"
("Юрий Гавенко" 200))
("references"
("@gavenkoa.example.com" 100)
("@desktop.home.int" 100))
(mark-and-expunge -10)
(thread-mark-and-expunge -10)
)