strip: remove usage of extranodes Instead of computing the exact set of missing revlog revisions, we only compute the set of missing/broken changesets. The resulting bundle can be slightly bigger but we will be able to get rid of the ugly extranodes handling in changegroupsubset.

patch: move closefile() into patchfile.close()

patch: inline patchfile.hashlines()

patch: fix hunk newlines when parsing hunks, not in iterhunks()