merge with apt/experimental

* apt-pkg/packagemanager.cc:
  - fix bug in predepends handling - ensure that packages that needs
    unpackaging are unpacked before they are configured (LP: #927993)
[ Julian Andres Klode ]
* apt-pkg/deb/deblistparser.cc:
  - Set the Essential flag on APT instead of only Important
* apt-pkg/packagemanager.cc:
  - Do not use immediate configuration for packages with the Important flag
* Treat the Important flag like the Essential flag with those differences:
  - No Immediate configuration (see above)
  - Not automatically installed during dist-upgrade
  - No higher score for installation ordering

diff --cc apt-pkg/algorithms.cc
Simple merge

diff --cc apt-pkg/packagemanager.cc
Simple merge

diff --cc debian/changelog
index 1569098c1d2519cd5ef636410f800eb6b21d883f,8e4c05d7cc0a41949063d37e8478fc92632045af..df89181a011a28fcc3bdd15bd4930d15f01c7b0a
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -73,8 -36,21 +73,21 @@@ apt (0.8.16~exp13) UNRELEASED; urgency=
        (LP: #923807)
    * apt-pkg/contrib/fileutl.h:
      - fix compat with FileFd::OpenDescriptor() in ReadOnlyGzip mode
+   * apt-pkg/packagemanager.cc:
+     - fix bug in predepends handling - ensure that packages that needs
+       unpackaging are unpacked before they are configured (LP: #927993)
+ 
+   [ Julian Andres Klode ]
+   * apt-pkg/deb/deblistparser.cc:
+     - Set the Essential flag on APT instead of only Important
+   * apt-pkg/packagemanager.cc:
+     - Do not use immediate configuration for packages with the Important flag
+   * Treat the Important flag like the Essential flag with those differences:
+     - No Immediate configuration (see above)
+     - Not automatically installed during dist-upgrade
+     - No higher score for installation ordering
  
 - -- David Kalnischkies <kalnischkies@gmail.com>  Mon, 30 Jan 2012 19:17:09 +0100
 + -- David Kalnischkies <kalnischkies@gmail.com>  Tue, 06 Mar 2012 10:52:00 +0100
  
  apt (0.8.16~exp12) experimental; urgency=low