- move the syncer into kern/vfs_subr.c.
- change the syncer to process the mountlist and VFS_SYNC as appropriate.
- use an API for mount points similiar to the API for vnodes:
- vfs_syncer_add_to_worklist(struct mount *mp) to add
- vfs_syncer_remove_from_worklist(struct mount *mp) to remove a mount.
No objections on tech-kern@
e10a32f7f7