[Portland] change xdg-open to use kde-open in kde4

[Rex Dieter]

Dave Greengas wrote:
> I was trying out Ubuntu One in kde 4 and I noticed that it uses xdg-open to
> open the Ubuntu One folder. This does not work in KDE4. It incorrectly tries
> to use generic_open which fails to open directories since their mime type is
> identified as application/octet-stream.
> 
> I added a check in kde_open to see if kde4-config is present. If it is, then
> I execute kde4_open instead of kde_open. The new function uses the kde4
> command kde-open to open the file/location specified in the command line.

Should be already fixed in cvs, see also:
https://bugs.freedesktop.org/show_bug.cgi?id=16212

Thought there do remain a few other kde4-related issues, including,
https://bugs.freedesktop.org/show_bug.cgi?id=17268
https://bugs.freedesktop.org/show_bug.cgi?id=17537
https://bugs.freedesktop.org/show_bug.cgi?id=19392

-- Rex