[Bug 12217] Documentation should be in XML and not SGML format

https://bugs.winehq.org/show_bug.cgi?id=12217

--- Comment #15 from Rosanne DiMesio  ---
As an experiment, I've done an initial import of the Wine User Guide into the
wiki. Pandoc does the heavy lifting nicely (thanks for the tip, Jerome), but
the output still needs manual tweaking. Formatting and links still need more
work, and I haven't updated any content yet, but it's in surprisingly good
shape considering how little time it took.
https://wiki.winehq.org/Wine_User_Guide

The question I have at this point is: if I import all the guides to the wiki,
can we get rid of the sgml versions? If the answer is no, it's not worth
spending my time on.