MFC: Make kern.geom.debugflags sysctl tunable from /boot/loader.conf.
     It will help to debug problems when booting.

Index: sys/geom/geom_kern.c
===================================================================
RCS file: /private/FreeBSD/src/sys/geom/geom_kern.c,v
retrieving revision 1.34
retrieving revision 1.35
diff -u -p -r1.34 -r1.35
--- sys/geom/geom_kern.c	10 Feb 2004 10:54:19 -0000	1.34
+++ sys/geom/geom_kern.c	13 Sep 2004 14:58:27 -0000	1.35
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/sys/geom/geom_kern.c,v 1.34 2004/02/10 10:54:19 phk Exp $");
+__FBSDID("$FreeBSD: src/sys/geom/geom_kern.c,v 1.35 2004/09/13 14:58:27 pjd Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -220,6 +220,7 @@ SYSCTL_PROC(_kern_geom, OID_AUTO, conftx
 	0, 0, sysctl_kern_geom_conftxt, "",
 	"Dump the GEOM config in txt");
 
+TUNABLE_INT("kern.geom.debugflags", &g_debugflags);
 SYSCTL_INT(_kern_geom, OID_AUTO, debugflags, CTLFLAG_RW,
 	&g_debugflags, 0, "");