support hashes for compressed pdiff files

At the moment we only have hashes for the uncompressed pdiff files, but
via the new '$HASH-Download' field in the .diff/Index hashes can be
provided for the .gz compressed pdiff file, which apt will pick up now
and use to verify the download. Now, we "just" need a buy in from the
creators of repositories…

1 files changed, 4 insertions, 7 deletions

diff --git a/apt-pkg/acquire-item.h b/apt-pkg/acquire-item.h
index f24af1aec..910e4131b 100644
--- a/apt-pkg/acquire-item.h
+++ b/apt-pkg/acquire-item.h
@@ -705,17 +705,14 @@ struct APT_HIDDEN DiffInfo {						/*{{{*/
    /** The filename of the diff. */
    std::string file;
 
-   /** The hashes of the diff */
+   /** The hashes of the file after the diff is applied */
    HashStringList result_hashes;
 
-   /** The hashes of the file after the diff is applied */
+   /** The hashes of the diff */
    HashStringList patch_hashes;
 
-   /** The size of the file after the diff is applied */
-   unsigned long long result_size;
-
-   /** The size of the diff itself */
-   unsigned long long patch_size;
+   /** The hashes of the compressed diff */
+   HashStringList download_hashes;
 };
 									/*}}}*/
 /** \brief An item that is responsible for fetching client-merge patches {{{