[RCD] Search filters

Hi!

Working with high-traffic mailboxes with threading turned on is annoying a lot when one needs to find specific not-so-old message hidden somewhere deep in long-ago-started thread (it could be on third or even fifth page).

Attached patch should solve this. (it is for review, without localization strings for now, should be easy to add).

Vladislav

--- 8< --- detachments --- 8< --- The following attachments have been detached and are available for viewing. http://detached.gigo.com/rc/Hk/2hE9zlQ3/rcmail-searchfilter.patch Only click these links if you trust the sender, as well as this message. --- 8< --- detachments --- 8< ---

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