Log Message:
Updated to version 4.40.
This fixes PR pkg/30290 by Nicolas Joly so the latest DAT files are working
again.

- Moved included DAT-files to shares/examples/uvscan/.
- Works with PKG_CONFIG=no.
- PDF manual included in share/doc/uvscan/.
- Some small improvements to update_dat.sh:
    Option "-h" shows the available options.
    All the "exit" statements use distinct values.
    Fixed a small logic bug (-z vs. -n).

Changes according to McAfee's website:
-   Includes technology to combat the latest and
    future threats.
-   Improved detection and cleaning.
-   Support for many more Packed Executable formats
    in which known malware is often re-packaged
    for obfuscation purposes.
-   Specific detection and reporting of files
    compressed or packaged with known suspicious
    applications.
-   Enhancements to the emergency DAT file (EXTRA.DAT)
    structure allowing a larger DAT file size.
-   Enhancements to enable scanning of non-standard
    ZIP archives.