(vc-name): Moved from vc.el; vc-rcs-status now uses it.
(vc-name, vc-backend-deduce): Set both vc-name and vc-backend properties, to avoid calling vc-registered unnecessarily when the other property is needed. (vc-rcs-status): Yield only status of locks; do not try to yield " REV" if there are no locks, since this cannot be done easily if there are branches. Use vc-name instead of duplicating its function incorrectly. Fix off-by-one bug when inserting master header pieces. Read headers 8192 bytes at a time instead of 100. Don't bother to expand-file-name. (vc-rcs-glean-field): Removed.
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