* linkify thread skeletons better
https://public-inbox.org/git/6E3699DEA672430CAEA6DEFEDE6918F4@PhilipOakley/
-* generate sample CSS for use with userContent.css/dillo/etc
-
* streaming Email::MIME replacement: currently we generate many
allocations/strings for headers we never look at and slurp
entire message bodies into memory.