html-conduit errors with decoding umlauts

[gbwey]

I am trying to read a file with an 'a' umlaut (\228) and it is failing with this error:

*** Exception: Error parsing XML file tstfile.txt: Data.Conduit.Text.decode: Error decoding str
eam of UTF-8 bytes. Error encountered in stream at offset 5. Encountered at byte sequence "\228
\223ga"

There does not appear to be any parseText option unlike in xml-conduit.
Does it make sense to provide the user the ability to supply a decoder (eg Latin1) and/or a parseText option?
Or is there another way to get this to work.

Thanks,
Grant

[snoyberg]

I don't see any inherent objection to a parseText option, a PR would be welcome.