changes for ddcutil 2.1.4

[Sanford Rockowitz]

The version of ddcutil in Debian is being updated to release 2.1.4. 
Shared library package libddcutil5 replaces libddcutil4.

Source package e17 has been identified as using libddcutil.

File e_system_ddc.c should be modified to try opening libddcutil.so.5 
before libddcutil.so.4.

In debian/control, consider adding:

Recommends: libddcutil4 (>= 1.4.1) | libddcutil5 (>= 2.1.4)
or
Suggests: libddcutil4 (>= 1.4.1) | libddcutil5 (>= 2.1.4)