largefiles: restore R status of removed largefiles correctly at "hg rollback" Before this patch, removed or forgotten largefiles aren't treated as removed ("R") after "hg rollback". Removed ones are treated as missing ("!") and forgotten ones are treated as clean ("C") unexpectedly. "overriderollback" uses "normallookup" to restore status in lfdirstate for largefiles other than ones not added in rollback-ed revision, but this isn't correct for removed (or forgotten) largefiles. This patch uses "lfutil.synclfdirstate" to restore "R" status of removed (or forgotten) largefiles correctly at "hg rollback". This is a temporary way to fix with less changes. For fundamental resolution of this kind of problems in the future, lfdirstate should be rollback-ed as a part of transaction, as same as dirstate.