kern/51610: rump doesn't include pre-5.0 compatability code

[paul%whooppee.com@localhost]

>Number:         51610
>Category:       kern
>Synopsis:       rump compatability only goes back to 5.0
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Mon Nov 07 21:45:00 +0000 2016
>Originator:     Paul Goyette
>Release:        NetBSD 7.99.42
>Organization:
+------------------+--------------------------+------------------------+
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:      |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com   |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org |
+------------------+--------------------------+------------------------+
>Environment:
	
	
System: NetBSD speedy.whooppee.com 7.99.42 NetBSD 7.99.42 (SPEEDY 2016-11-04 07:29:45) #0: Sat Nov 5 18:09:20 PHT 2016 paul%speedy.whooppee.com@localhost:/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/SPEEDY amd64
Architecture: x86_64
Machine: amd64
>Description:
Rump kerneles are built with only COMPAT_50 and above.  Thus it is not
possible to test some things such as ioctl argument conversions (such as
those defined in sys/compat/common/if_43.c).
	
>How-To-Repeat:
Build a rump kernel.
	
>Fix:
Update rump build to include all compatability options in every rump kernel.

Alternatively, update rump to include _NO_ compatability options, and allow
the rump kernel to load a default compat module (which includes all of the
COMPAT_xx options).
	

>Unformatted: