Upgrade to dvbcut version 0.5.4.
This version is announced as equivalent to SVN rev 25.
All patches are reverted to previous versions (i.e., most are removed).
This upgrade should also fix build errors that were caused by a recent
upgrade of to the ffmpeg version in the FreeBSD ports tree. The ffmpeg
developers publicly state, that they only want to support use of the
library from C sources (c99, specifically) and that it is planned to
drop C++ compatibility. This will affect dvbcut, which is writte in
C++. At that time, the port may want to use the old version of ffmpeg
that is distributed with dvbcut (but which may miss FreeBSD specific