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, 4 deletions

diff --git a/apt-pkg/contrib/hashes.h b/apt-pkg/contrib/hashes.h
index 636cad257..979ee1eb8 100644
--- a/apt-pkg/contrib/hashes.h
+++ b/apt-pkg/contrib/hashes.h
@@ -17,17 +17,22 @@
 #include <apt-pkg/md5.h>
 #include <apt-pkg/sha1.h>
 #include <apt-pkg/sha2.h>
-#include <apt-pkg/fileutl.h>
 
-#include <algorithm>
-#include <vector>
 #include <cstring>
-
+#include <string>
 
 #ifndef APT_8_CLEANER_HEADERS
 using std::min;
 using std::vector;
 #endif
+#ifndef APT_10_CLEANER_HEADERS
+#include <apt-pkg/fileutl.h>
+#include <algorithm>
+#include <vector>
+#endif
+
+
+class FileFd;
 
 // helper class that contains hash function name
 // and hash