* merged pdiff support

Patches applied:

 * michael.vogt@canonical.com--2004/apt--bwlimit--0--base-0
   tag of apt@packages.debian.org/apt--main--0--patch-47

 * michael.vogt@canonical.com--2004/apt--bwlimit--0--patch-1
   * fist attempt for bwlimit

 * michael.vogt@canonical.com--2004/apt--bwlimit--0--patch-2
   * add a nanosleep, making it less cpu intensive

 * michael.vogt@canonical.com--2004/apt--bwlimit--0--patch-3
   * use SingleInstance when DlLimit is activated

 * michael.vogt@canonical.com--2004/apt--bwlimit--0--patch-4
   * cleanups, no code changes

 * michael.vogt@ubuntu.com--2005/apt--bwlimit--0--base-0
   tag of apt@packages.debian.org/apt--main--0--patch-76

 * michael.vogt@ubuntu.com--2005/apt--bwlimit--0--patch-1
   * merged the apt--main with the 2004 bwlimit tree

 * michael.vogt@ubuntu.com--2005/apt--local-install--0--base-0
   tag of michael.vogt@ubuntu.com--2005/apt--bwlimit--0--patch-1

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--base-0
   tag of michael.vogt@ubuntu.com--2005/apt--local-install--0--base-0

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-1
   * first rewrite of the apt pdiff support patch finished

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-2
   * use "red" now, print meaningfull pdiff names, use IMS for the IndexDiff

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-3
   * merge with matt, search for the right patch next instead of applying them in order

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-4
   * fix a bug QueueNextDiff

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-5
   * another bug in QueueNextDiff fixed

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-6
   * merged with apt--main and apt--fixes

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-7
   * added methods/rred.cc (thanks to robertle)

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-8
   * use the new cool rred method for the patchting

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-9
   * merged with mainline

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-10
   * rred.cc: use the d'tor of FileFd to close the file-fd; acquuire-item.cc: make the QueueNextDiff() code more robust

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-11
   * bugfix/updates in the rred.cc code (big thanks for helping Robert!)

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-12
   * method/rred.cc cleanup (thanks to robertle)

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-13
   * debug support (Debug::pkgAcquire::RRed) for rred method added

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-14
   * split the diff acquire code in a bit that gets the index file and one that gets the patches. that make the code cleaner and the list-cleaner happy

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-15
   * fixed apt-pkg/acquire-item.h (looks like the last commit didn't include it?)

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-16
   * fix a missing StatDone if nothing needs to be fetched

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-17
   * be less verbose and call the Url-Remap: APT::URL-Remap

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-18
   * dont bump the soname, it doesn't break the abi!

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-19
   * merged with michael.vogt@ubuntu.com--2005/apt--mvo--0 to be in sync with debian

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-20
   * don't forget the final md5sum checking!

 * michael.vogt@ubuntu.com--2005/apt--pdiff--0--patch-21
   * removed the URL-Reamp hack (we have pdiff support in the main archive now), removed bw-limit support (NO idea how that got into this archive in the first place)

diff --cc apt-pkg/acquire-item.cc
Simple merge

diff --cc apt-pkg/acquire-item.h
Simple merge