When updating NFILES do it by writing a tmp file and renaming.  This is to address a race in t.parallel that I don't understand.  But since this file gets written by 'bk sfiles' which is a read-only operation, this seems wise anyway.
When updating NFILES do it by writing a tmp file and
renaming.  This is to address a race in t.parallel that I don't
understand.  But since this file gets written by 'bk sfiles' which
is a read-only operation, this seems wise anyway.

bk: 510a8698tNwOB8UYStz5DCUhmjdKhA
bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper