add NetBSD total memory information

[Yorick Hardy <yh@metroweb.co.za>]

The patch adds the sysctl calls for NetBSD to determine
the physical memory available.

Also combine the FreeBSD and NetBSD sysctl calls using the
function common to both platforms, it should be okay but
can a FreeBSD developer double-check this ?

-- 
Yorick Hardy

--- memory/global.c.orig	Wed Mar 26 10:19:07 2003
+++ memory/global.c	Wed Mar 26 10:22:37 2003
@@ -1573,9 +1573,10 @@
 #ifdef linux
     FILE *f;
 #endif
-#ifdef __FreeBSD__
+#if defined(__FreeBSD__) || defined(__NetBSD__)
     int *tmp;
     int size_sys;
+    int mib[2] = { CTL_HW };
 #endif
     if (time(NULL)==cache_lastchecked) {
 	memcpy(lpmem,&cached_memstatus,sizeof(MEMORYSTATUS));
@@ -1637,17 +1638,19 @@
                                       / (TotalPhysical / 100);
         }
     }
-#elif defined(__FreeBSD__)
-    sysctlbyname("hw.physmem", NULL, &size_sys, NULL, 0);
+#elif defined(__FreeBSD__) || defined(__NetBSD__)
+    mib[1] = HW_PHYSMEM;
+    sysctl(mib, 2, NULL, &size_sys, NULL, 0);
     tmp = malloc(size_sys * sizeof(int));
-    sysctlbyname("hw.physmem", tmp, &size_sys, NULL, 0);
+    sysctl(mib, 2, tmp, &size_sys, NULL, 0);
     if (tmp && *tmp)
     {
         lpmem->dwTotalPhys = *tmp;
 	free(tmp);
-	sysctlbyname("hw.usermem", NULL, &size_sys, NULL, 0);
+	mib[1] = HW_USERMEM;
+	sysctl(mib, 2, NULL, &size_sys, NULL, 0);
 	tmp = malloc(size_sys * sizeof(int));
-	sysctlbyname("hw.usermem", tmp, &size_sys, NULL, 0);
+	sysctl(mib, 2, tmp, &size_sys, NULL, 0);
 	if (tmp && *tmp)
 	{
 	    lpmem->dwAvailPhys = *tmp;