[bug-gnubatch] Changing comment of variables from the command line

[Reuti]

Hi,

although the -c option is listed in the help of gbch-var:

$ gbch-var -?
gbch-var options are:
...
   -c comment  assign comment

It is silently ignored and just giving the content of the variable.  
OTOH the -c option is missing from the usage output:

$ gbch-var
Usage:
   gbch-var [-SDCXELkK] [-u value ] [-s value ] [+eq|+ne|+lt|+le|+gt| 
+ge value ] Var

(changing the comment from the gbch-q works fine though)

-- Reuti