Open files can't be moved on NT

[Martin Stjernholm]

Using CVS 1.10 on NT with NTFS file system:

1.  Add and commit a file on some branch other than the main trunk.
2.  Add and commit the same file on the main trunk.

CVS will complain that it can't move the file from the attic due to
"permission denied". The real reason is that the file is open, and NT
can't move open files. The reason for that is that rcs.c caches the
last opened file, and commit.c does rcs operations on the file in the
attic before moving it.

Note: This is experienced with version 1.10. For various reasons I'm
not in a position to upgrade, so I haven't tested later versions. I've
made a crude patch for my own use, so this is just to let you know.