Delete trailing spaces; Use tabs instead of spaces
We don't support Solaris
flowgrindd - clean up usage and option parsing

This patch cleans up the option parsing and usage. The usage and the error
messages while parsing the command line are based on the output form the
coreutils
flowgrind_stop - Clean up usage and option parsing

This patch cleans up the option parsing and usage. The usage and the error
messages while parsing the command line are based on the output form the
coreutils