charset; logical OR on filtering; list of dates

Dear Roundup Users,

Now there are 3 questions in my mind about roundup (the last one is a
bit more general): 

1. The first one is probably a lame question.
How can I serve the content of a text/plain file (from a FileClass) with
a specified encoding? To be more precise, I want my browser to open
http://localhost:8080/tracker/msg4/textfile.txt
with "Content-Type: text/plain; charset=UTF-8" header.
I do not know how to achieve this using a standalone roundup server (or
running roundup-server behind an Apache proxy).

2. Can I do logical OR operation on database filtering, concerning
different properties?
For example, I want to list issues with "assignedto=15 OR actor=15".
Do we have a built-in query for this, or shall I utilize filter_sql, or
any other custom solution?

3. This one is a little more general. I know that relational databases
are not designed to store lists/arrays. But I have to implement somehow
a property (let's call it "important_dates") which stores a LIST of
dates. What is the best practice to implement this?

Although these questions are not among first world problems, but any
help / ideas are appreciated. :)

Thanks in advance,
Gábor





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