As now we can properly recognize all paramerters for pool creation,
we may drop PASS_ARG_ defines and rely on '_UNSELECTED' or 0 entries
as being those without user given args.
When setting are not given on command line - 'update' function
fill them from profiles or configuration. For this 'profile' arg
was needed to be passed around and since 'VG' itself is not needed,
it's been all replaced with 'cmd, profile, extents_size' args.
git://sourceware.org / lvm2.git / commit