Re: Search using email headers does not work

diff --git a/c4/22f9ee06386ad4499caa249f49b213df22a46b b/c4/22f9ee06386ad4499caa249f49b213df22a46b
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+From: David Bremner <david@tethera.net>\r
+To: Carl Worth <cworth@cworth.org>, Michal Vyskocil <mvyskocil@suse.cz>,\r
+       notmuch@notmuchmail.org\r
+Subject: Re: Search using email headers does not work\r
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+References: <20130211145259.GF7346@zelvantb.site>\r
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+Date: Tue, 12 Feb 2013 16:05:07 -0400\r
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+\r
+Carl Worth <cworth@cworth.org> writes:\r
+>\r
+> It's embarrassing to me that I added this note to the notmuch TODO file\r
+> in October 2009 (and it's still there):\r
+>\r
+>     Add support for the user to specify custom headers to be indexed.\r
+\r
+One techicality is that we would presumeably want to support this both\r
+for access via the CLI and via libnotmuch (e.g. for the python\r
+bindings).  So there is the question of where to store the list of\r
+indexed headers; perhaps in Xapian metadata. Or is there some simpler\r
+solution?\r
+\r
+d\r