Merge michael.vogt@ubuntu.com--2005/apt--fixes--0

Merge michael.vogt@ubuntu.com--2005/apt--fixes--0
Patches applied:

 * apt@packages.debian.org/apt--misc-abi-changes--0--patch-4
   Merge from mainline

 * apt@packages.debian.org/apt--misc-abi-changes--0--patch-5
   Merge from mainline

 * apt@packages.debian.org/apt--misc-abi-changes--0--patch-6
   Collapse both pkgAcquire::Run() methods into one, with a default value

 * michael.vogt@ubuntu.com--2005/apt--fixes--0--base-0
   tag of apt@packages.debian.org/apt--main--0--patch-79

 * michael.vogt@ubuntu.com--2005/apt--fixes--0--patch-1
   * merged obvious fixes into the tree to make it easy for matt to merge

 * michael.vogt@ubuntu.com--2005/apt--fixes--0--patch-2
   * more merges from otavio that looks good/uncritical

 * michael.vogt@ubuntu.com--2005/apt--fixes--0--patch-3
   * merged Matts misc-abi-changes tree

 * michael.vogt@ubuntu.com--2005/apt--fixes--0--patch-4
   * finalized the changelog for a ubuntu build

 * michael.vogt@ubuntu.com--2005/apt--mvo--0--patch-26
   * fix the cache-control header generation

 * otavio@debian.org--2005/apt--fixes--0--base-0
   tag of apt@packages.debian.org/apt--main--0--patch-71

 * otavio@debian.org--2005/apt--fixes--0--patch-1
   Fix comments about the need of xmlto

 * otavio@debian.org--2005/apt--fixes--0--patch-2
   Fix a compile warning

 * otavio@debian.org--2005/apt--fixes--0--patch-3
   Sync with apt--main--0--patch-76

 * otavio@debian.org--2005/apt--fixes--0--patch-4
   Sync with apt--main--0--patch-78

 * otavio@debian.org--2005/apt--fixes--0--patch-5
   Add fixes that was wrongly included on DDTP changes.

 * otavio@debian.org--2005/apt--fixes--0--patch-8
   Add information about the other fixes include on this branch now.

 * otavio@debian.org--2005/apt--fixes--0--patch-9
   Merge last changes from apt--main--0.

 * otavio@debian.org--2005/apt--fixes--0--patch-10
   Fix warnings about min/max change in gcc-4.0

 * otavio@debian.org--2005/apt--fixes--0--patch-11
   Fix remaning warnings while compiling gcc-4.0

 * otavio@debian.org--2005/apt--fixes--0--patch-12
   Add changelog entry about the fixes for warnings while compiling using GCC 4.0 compiler.