Add -usetokens option to libadmin test 'afscp'

Add -usetokens option to libadmin test 'afscp'

This adds a -usetokens option to poorly named libadmin test 'afscp' program.
If called with this flag, 'afscp' will assume you have already acquired
tokens, and will fetch and use them. If ran with the -authcell option,
it will look for tokens for that cell, otherwise it will look for tokens
in the local cell. Since the function used to fetch local tokens is
incompatable with the kas functions, all of the kas commands have been
modified to complain and exit if any of them all called with -usetokens.

Fixed whitespace, again.

Change-Id: I4f9bcbae42f6eb179168bb5d152ed36df3db8dd5
Reviewed-on: http://gerrit.openafs.org/3899
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Reviewed-by: Dan Hyde <drh@umich.edu>
Reviewed-by: Steve Simmons <scs@umich.edu>
Tested-by: Derrick Brashear <shadow@dementia.org>