* detect crashes in the program's stdout/stderr (eg. mplayer)

  * Parallelise operations.
  * improve our basic support for [f]open/[f]read, etc. (fscanf, fgets, also
    see what sed is using)

  * socket support
  * marker support (eg. \r\n\r\n in HTTP responses)

  * ASCII support, UTF-8 support

  * Huge todo: be format-aware
    - recompute checksums
    - divert zlib functions, too