Avoid a table scan of ACTUAL_NODES for every directory during wc copy operations by splitting a query into two separate queries that each use the right index.
* subversion/libsvn_wc/wc-queries.sql (STMT_SELECT_CONFLICT_MARKER_FILES): Split this query into ... (STMT_SELECT_CONFLICT_MARKER_FILES1): ... this, for the directory and ... (STMT_SELECT_CONFLICT_MARKER_FILES2): ... this, for the nodes within.
* subversion/libsvn_wc/wc_db.c (get_conflict_marker_files): New function. Using two queries. Extracted from ... (svn_wc__db_get_conflict_marker_files): ... this function.