* apt-pkg/deb/dpkgpm.cc:

* apt-pkg/deb/dpkgpm.cc:
  - use std::vector instead of fixed size arrays to store args and
    multiarch-packagename strings
  - load the dpkg base arguments only one time and reuse them later
* cmdline/apt-get.cc:
  - follow Provides in the evaluation of saving candidates, too, for
    statisfying garbage package dependencies (Closes: #640590)
* apt-pkg/algorithms.cc:
  - if a package is garbage, don't try to save it with FixByInstall