netcdf-c

1. synch with oc
2. modify oc2/ocrc.c rcfilenames to look for .ocrc before .dodsrc.
3. Modify testauth.sh to avoid using names that might already
   exist for cookies file and netrc file. Still must use .ocrc
   to test for local/home search.
4. Modify testauth.sh to save and restore any file it creates
   that already exists.