* merged daniels wonderful doxygen work

Patches applied:

 * dburrows@debian.org--2005/apt--0--base-0
   tag of mvo@debian.org--2005/apt--debian-experimental--0--patch-9

 * dburrows@debian.org--2005/apt--doxygen--0--base-0
   tag of dburrows@debian.org--2005/apt--0--base-0

 * dburrows@debian.org--2005/apt--doxygen--0--patch-1
   Generate Doxygen output in build/doc/doxygen if Doxygen is installed.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-2
   Partially document the acquire item objects.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-3
   Add an 'acquire' group to collect the stuff related to Acquire.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-4
   Don't pick up emacs autosaves when generating the list of doxygen inputs.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-5
   Don't include redundant scope information in the doxygen output.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-6
   Write more general Acquire documentation.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-7
   I don't know why, but stuff just appeared in my tree.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-8
   Write/edit more Acquire documentation.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-9
   Document pkgAcquire::ItemDesc and pkgAcquire::Queue.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-10
   Document UriIterator (left out documentation of the standard iterator operators).

 * dburrows@debian.org--2005/apt--doxygen--0--patch-11
   Give pkgAcquire::Queue a brief description.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-12
   Add a brief description to pkgAcquire::Item.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-13
   Add a brief description to the DiffInfo class.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-14
   Document pkgAcquire::MethodConfig.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-15
   Document pkgAcquireStatus

 * dburrows@debian.org--2005/apt--doxygen--0--patch-16
   Edit the pkgAcquire::Item documentation to be more in line with how Acquire is documented.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-17
   Document pkgAcqDiffIndex.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-18
   Document the Md5Hash parameter to pkgAcquire::Item::Done.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-19
   Fix a spelling error

 * dburrows@debian.org--2005/apt--doxygen--0--patch-20
   Document pkgAcqIndexDiffs and fix up some previously written documentation.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-21
   Mark the brief descriptions in the acquire item documentation.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-22
   Add documentation about the format of the Message parameter to Done&friends.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-23
   Document pkgAcqIndex.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-24
   Document pkgAcqIndexTrans.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-25
   Autogenerate Doxyfile when Doxyfile.in is modified.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-26
   Check for graphviz in configure.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-27
   Fix the detection of dot.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-28
   If dot is detected, use it to build the documentation.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-29
   Argh, pot update.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-30
   Require graphviz when building the Debian packages.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-31
   Document IndexTarget.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-32
   Consistently capitalize the first word following \param.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-33
   Document pkgAcqMetaSig.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-34
   Be a bit clearer about just what a pkgAcquire::Item is.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-35
   Document pkgAcqMetaIndex.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-36
   Document pkgAcqArchive

 * dburrows@debian.org--2005/apt--doxygen--0--patch-37
   Document pkgAcqFile

 * dburrows@debian.org--2005/apt--doxygen--0--patch-38
   Apply patches from mvo

 * dburrows@debian.org--2005/apt--doxygen--0--patch-39
   Update the Doxyfile template.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-40
   Enable BUILTIN_STL_SUPPORT.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-41
   Whoops: \e, not \i, is used to enable italics.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-42
   Editorial changes and clarifications to the documentation in  acquire-item.h

 * dburrows@debian.org--2005/apt--doxygen--0--patch-43
   Clean out the old doxygen output before generating new output.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-44
   Fix setting and using the DOT_PATH doxygen configuration parameter.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-45
   Make the documentation of ��pkgAcquire::MethodConfig::SendConfig somewhat more accurate.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-46
   Partially document pkgAcquire::Worker.

 * dburrows@debian.org--2005/apt--doxygen--0--patch-47
   Finish documenting pkgAcquire::Worker

 * michael.vogt@ubuntu.com--laptop/apt--doxygen--0--base-0
   tag of dburrows@debian.org--2005/apt--doxygen--0--patch-37

 * michael.vogt@ubuntu.com--laptop/apt--doxygen--0--patch-1
   * some documentation updates

 * michael.vogt@ubuntu.com--laptop/apt--doxygen--0--patch-2
   * apt-pkg/acquire-item.h: reviewed and some modifications

 * michael.vogt@ubuntu.com--laptop/apt--doxygen--0--patch-3
   * minor doc update

 * michael.vogt@ubuntu.com--laptop/apt--doxygen--0--patch-4
   * updated after the input from dburrows

 * mvo@debian.org--2005/apt--debian-sid--0--base-0
   tag of michael.vogt@ubuntu.com--2005/apt--mvo--0--patch-71

 * mvo@debian.org--2005/apt--debian-sid--0--patch-1
   * merged with apt--mvo--0

 * mvo@debian.org--2005/apt--debian-sid--0--patch-2
   * merged with apt--mvo

 * mvo@debian.org--2005/apt--debian-sid--0--patch-3
   * updated apt-all.pot

 * mvo@debian.org--2005/apt--debian-sid--0--patch-4
   * merged with apt--mvo

 * mvo@debian.org--2005/apt--debian-sid--0--patch-5
   * merge with apt--mvo--0

 * mvo@debian.org--2005/apt--debian-sid--0--patch-6
   * merge with apt--mvo

 * mvo@debian.org--2005/apt--debian-sid--0--patch-7
   * applied patch from Petr Vandrovec to fix http download corruption

 * mvo@debian.org--2005/apt--debian-sid--0--patch-8
   * merged with apt--mvo, regenerated the po files

 * mvo@debian.org--2005/apt--debian-sid--0--patch-9
   * merged with apt--mvo

1 files changed, 2 insertions, 0 deletions

diff --git a/buildlib/environment.mak.in b/buildlib/environment.mak.in
index f5ee539ac..2d28e1c67 100644
--- a/buildlib/environment.mak.in
+++ b/buildlib/environment.mak.in
@@ -28,6 +28,8 @@ INLINEDEPFLAG = -MD
 DEBIANDOC_HTML = @DEBIANDOC_HTML@
 DEBIANDOC_TEXT = @DEBIANDOC_TEXT@
 
+DOXYGEN = @DOXYGEN@
+
 # SGML for the man pages
 DOCBOOK2MAN := @DOCBOOK2MAN@