* origin/multi-mid:
view: show X-Alt-Message-ID in permalink view, too
index: allow search/lookups on X-Alt-Message-ID
linkify: support adding "(raw)" link for Message-IDs
view: improve warning for multiple Message-IDs
view: move '<' and '>' outside <a>
view: display redundant headers in permalink
search: support multiple From/To/Cc/Subject headers