Log Message:
Update "netpbm" package to version 10.35.78. Changes since 10.35.77:
- bmptopnm: Don't crash on invalid zero value of image height in
  the BMP header of a compressed file.  Always broken.
- bmptopnm: don't crash on large invalid value of 'colorsused' in
  the BMP header.
- ilbmtoppm: Don't crash on image that has a transparent color
  index, but no color map.

"pkgsrc" changes:
- Add a lot of patches written by Thomas Klausner and me to make this
  compile with PNG 1.5.