People got confused when quassel did not accept their keyfile; now a
message is shown hinting at the possibility of a passphrase being
present.
#include <QDropEvent>
#include <QFileDialog>
#include <QUrl>
#include <QDropEvent>
#include <QFileDialog>
#include <QUrl>
#include "client.h"
#include "iconloader.h"
#include "client.h"
#include "iconloader.h"
+ QMessageBox::information(this, tr("Failed to read key"), tr("Failed to read the key file. It is either incompatible or invalid. Note that the key file must not have a passphrase."));