We might want to only change a parameter rather than have to set all possible
parameters, so add "partial" commands.
These commands only change the specified parameter.
To avoid duplicating code all around, a unique parser is kept. This parser uses
the .data parameter to select the right behavior.
Signed-off-by: David Marchand <david.marchand@6wind.com>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
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