qemu: Don't try to parse -help for new QEMU
Since QEMU 1.2.0, we switched to QMP probing instead of parsing -help (and other commands, such as -cpu ?) output. However, if QMP probing failed, we still tried starting QEMU with various options and parsing the output, which was guaranteed to fail because the output changed. Let's just refuse parsing -help for QEMU >= 1.2.0. https://bugzilla.redhat.com/show_bug.cgi?id=1160318Signed-off-by: NJiri Denemark <jdenemar@redhat.com>
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