r7511: Add three new command line switches to testparm:

r7511: Add three new command line switches to testparm:

--show-all-parameters
        Enumerates all available parameters, grouped in to sections
        [local] and [global] by the class of the parameter.  Each line
        is formated name=type[,enum values],flags
--parameter-name
        Display the setting of the named parameter.  The global section
        is assumed if no other is set with --section-name
--section-name
        Limit the view of testparm to the named section.  Use 'global'
        to only view the settings of the global section.

This fixes bug #2767.

Lars
(This used to be commit a1b82624d739b1066c356dd4b689233f3c36814e)