This eliminates a race condition between the disk driver calling sys_statectl(SYS_STATE_CLEAR_IPC_REFS) as part of driver_announce(), and the root MFS calling sendrec(DEV_OPEN) on the disk driver.
servers/hgfs/hgfs_server => servers/hgfs servers/hgfs/libhgfs => lib/libhgfs servers/rs/service => commands/service drivers/memory/memory_driver => drivers/memory drivers/memory/ramdisk => drivers/ramdisk