add charset and viewport

support CSS

use base16 to inline favicon

add hardcoded favicon

use UTF-8 for known text formats

support javascript mime types

support m3u playlists

simplify: no need for explicit suspendable-ports now that server is in a fiber

implement servent mode: serve-and-download

todo

Use bytevector-copy! instead of u8->list, overhead for 400MiB files was reduced from 12 minutes to 7 seconds

use max chunk size 4 MiB.

heuristic: anyone asking for a language can accept a range response

only serve range requests to clients that support them

include connection close, as by https://tools.ietf.org/html/rfc2616#section-14.10

save download to file

implement chunked download

implement chunked download

polish

fix example