hw.ata.atapi_dma vanished

Hello, grumpf,

after having had the first spontanous reboot with -current for a long time I 
wanted to look for hw.ata.atapi_dma (since the machine crashed (without ANY 
report) when I tried to access the CD) and found it's gone.
The man page still tells my stories about that sysctl.

What news did I miss?

Thank you,

-Harry