Add optional parameter for changed/added/del/unknown files to commands.dodiff
This makes it possible to avoid a call into repo.changes if the details
of what has changed is already known
+ hg init
+ hg addremove
adding foo
+ hg commit -m 1
+ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
+ hg clone http://localhost:20059/ copy
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
+ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
+ hg co
foo
+ hg manifest
2ed2a3912a0b24502043eae84ee4b279c18b90dd 644 foo
+ hg pull
pulling from http://localhost:20059/
searching for changes
no changes found
killed!