Update to upstream version '0.3.3+dfsg'
with Debian dir 31594eed1279a555c24e14d707ba59360f2666c8

findlongest.c:101:28: error: argument 1 value ‘2147483648’ exceeds maximum object size 2147483647 [-Werror=alloc-size-larger-than=]
  101 |     uint8_t *stringsSeen = calloc((uint64_t)1 << (MAX_STRING_SIZE-3u), sizeof(uint8_t));
      |                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Removing unrequired header definitions and get processBytes() into a shape for readData()

Fix `-Werror` failure on Alpine/MUSL libc & GCC 10

The return type of `getc(3)` is a signed integer,
with negative values indicating an error. The changed
line stored the return value in an *unsigned* integer,
then tested it against a negative error constant, so
the error condition would never be detected. This
also results in a warning on GCC 10.

Further information:
- [`getc(3)`](https://man7.org/linux/man-pages/man3/fgetc.3.html)
- [C FAQ question 12.1](http://c-faq.com/stdio/getcharc.html)

`poll.h` is the POSIX standard include location, and MUSL
libc issues a warning (which infnoise's `-Werror` in CFLAGS
makes into an error).

For more context:
- [Linux manpage for `poll(2)`][1]
- [Open Group UNIX Specification][2]
- [Relevant discussion over at the `emscripten` project][3]

[1]: https://man7.org/linux/man-pages/man2/poll.2.html
[2]: https://pubs.opengroup.org/onlinepubs/7908799/xsh/poll.h.html
[3]: https://github.com/emscripten-core/emscripten/issues/5447#issuecomment-321513332

Closes: #911587

Closes: #930876

Fix some issues reported by lintian

See merge request !1

Fixes: lintian: out-of-date-standards-version
See-also: https://lintian.debian.org/tags/out-of-date-standards-version.html

Fixes: lintian: upstream-metadata-file-is-missing
See-also: https://lintian.debian.org/tags/upstream-metadata-file-is-missing.html


Fixes: lintian: upstream-metadata-missing-bug-tracking
See-also: https://lintian.debian.org/tags/upstream-metadata-missing-bug-tracking.html


Fixes: lintian: upstream-metadata-missing-repository
See-also: https://lintian.debian.org/tags/upstream-metadata-missing-repository.html

Fixes: lintian: uses-debhelper-compat-file
See-also: https://lintian.debian.org/tags/uses-debhelper-compat-file.html

Fixes: lintian: package-uses-old-debhelper-compat-version
See-also: https://lintian.debian.org/tags/package-uses-old-debhelper-compat-version.html