Simple patch: Make DFLTPHYS an option

[Poul-Henning Kamp]

In message <20040103.153644.107852018.imp at bsdimp.com>, "M. Warner Losh" writes:

>The folks on IRC cautioned that this is not for the feign of heart,
>since there's 'issues' with physio, MAXPHYS, etc.
>
>Comments?

We need to get MAXPHYS into the megabyte range eventually.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.