$NetBSD$

Adding NetBSD target.

--- BUILD.orig	2023-09-26 14:04:46.783172503 +0000
+++ BUILD
@@ -57,6 +57,7 @@ if ($UNAME == "AIX")    	setenv WWW_MACH
 if ($UNAME == "OSF1")   	setenv WWW_MACH	osf1
 if ($UNAME == "BSD/386")	setenv WWW_MACH	unix
 if ($UNAME == "Linux")		setenv WWW_MACH	linux
+if ($UNAME == "NetBSD")		setenv WWW_MACH	netbsd
 if ($UNAME == "A/UX")		setenv WWW_MACH	aux
 if ($UNAME == "SMP_DC.SOx")	setenv WWW_MACH	pyramid
 if ($UNAME == "uts") then