Fix: appver sourcing syntax

Signed-off-by: Miroslav Safr <Miroslav.Safr@gmail.com>
Signed-off-by: Miroslav Safr <Miroslav.Safr@tieto.com>
New: xmlenv backup, Fix: command testing, cmdline help

Signed-off-by: Miroslav Safr <Miroslav.Safr@gmail.com>