Setting MAXDSIZ, MAXSSIZ, DFLDSIZ via kernel OIDs?

[O. Hartmann]

Hello.
Due to runtime problems of several F77 code based scientific
software I increased possible data segment size and stack by the
shown values.

options         MAXDSIZ=(2048UL*1024*1024)
options         MAXSSIZ=(1024UL*1024*1024)
options         DFLDSIZ=(1024UL*1024*1024)

These changes implies building a new kernel and I would like to know
how I can set these parameters via kern.l OIDs (in  loader.conf.local).

Thanks,
 Oliver