encoding of message-ids

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+ Tue, 16 Feb 2016 12:38:09 -0000\r
+From: David Bremner <david@tethera.net>\r
+To: notmuch@notmuchmail.org\r
+Subject: encoding of message-ids\r
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+ (x86_64-pc-linux-gnu)\r
+Date: Tue, 16 Feb 2016 08:38:09 -0400\r
+Message-ID: <87si0svnim.fsf@zancas.localnet>\r
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+\r
+I spent a little time this morning staring at the code, and it seems\r
+that all of the message-ids are parsed via g_mime_decode_text, which\r
+deals with RFC2047 encodings and makes guesses at decoding 8bit\r
+characters. In practice this means that in the notmuch database all\r
+headers are UTF-8. Since message-id's are supposed to be printable ascii\r
+[at least in rfc5322], this seems like not such a terrible decision, but\r
+I wonder if we should document this potential conversion somewhere?\r
+\r
+d\r
+\r