A bit more extensive and useful error reporting.

In case the server start fails we now get a dialog showing the results
of a number of self-tests for common problems (eg. missing QtSQL driver
or MySQL server) and the errors reported by the server (once it actually
reports errors at least). It also allows to generate a report from all
that and save it into a file for use in bug reports.

svn path=/trunk/KDE/kdepimlibs/; revision=858271