Client-specific options table doesn't work with > 3 entries

The ccd_val nvram variable stores all of the table entries.  When it is read in, it's copied to the local buffer, which is limited to 128 bytes, in one shot.  This is enough for 3, but not 4, entries.  The CCD parsing logic should be reworked to only copy one entry or one field into the local buffer at a time.
