getopt for top

Hi Craig,

I decided to normalize top's 'help' and 'version' handling which then 
involved adding long-form option support.

I also addressed the quirks associated with a getopt 'optional' argument 
and the inconsistent approach to the equals sign. To quote from the man 
page:

      The equals sign can be used with either option form
      and whitespace before and/or after the `=' is permitted.

Attached are the resulting patches for our two branches.

Thanks in advance for the pushes.

Regards,

Jim

p.s. any idea when newlib might be born?