cleanup headers and especially #includes everywhere

Beside being a bit cleaner it hopefully also resolves oddball problems
I have with high levels of parallel jobs.

Git-Dch: Ignore
Reported-By: iwyu (include-what-you-use)

1 files changed, 9 insertions, 1 deletions

diff --git a/apt-pkg/deb/debsystem.h b/apt-pkg/deb/debsystem.h
index 855123516..a945f68fb 100644
--- a/apt-pkg/deb/debsystem.h
+++ b/apt-pkg/deb/debsystem.h
@@ -12,11 +12,19 @@
 
 #include <apt-pkg/pkgsystem.h>
 #include <apt-pkg/pkgcache.h>
+#include <apt-pkg/cacheiterators.h>
 
+#include <vector>
+class Configuration;
+class pkgIndexFile;
+class pkgPackageManager;
 class debSystemPrivate;
-class debStatusIndex;
 class pkgDepCache;
 
+#ifndef APT_10_CLEANER_HEADERS
+class debStatusIndex;
+#endif
+
 class debSystem : public pkgSystem
 {
    // private d-pointer