* apt-pkg/indexcopy.cc:
  - rename RunGPGV to ExecGPGV and move it to apt-pkg/contrib/gpgv.cc
Conflicts:
	apt-pkg/indexcopy.cc
	debian/changelog
split out a method to strip whitespaces only on the right side
  - add method to open (maybe) clearsigned files transparently
* ftparchive/writer.cc:
  - use OpenMaybeClearSignedFile to be free from detecting and
    skipping clearsigning metadata in dsc files
Conflicts:
	apt-pkg/contrib/gpgv.cc
	apt-pkg/contrib/gpgv.h
	debian/changelog
	ftparchive/writer.cc