• The new “H S” filter searches for mail that contains string S in
the content of any non-internal header.
Based on patches¹² by H.Merijn Brand <h.m.brand@xs4all.nl>, with some
reversion, refactoring, minor improvements and fixed typos.
¹ http://lists.claws-mail.org/pipermail/devel/2014-August/001257.html
² http://lists.claws-mail.org/pipermail/devel/2014-August/001258.html