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devcons: remove /dev/reboot "halt" command...

the "halt" command written to /dev/reboot just causes the
machine to crash... its also undocumented... removing it.

--
cinap

--- a/sys/src/9/port/devcons.c

+++ b/sys/src/9/port/devcons.c

@@ -28,7 +28,6 @@

 enum

 {

-	CMhalt,

 	CMreboot,

 	CMpanic,

 	CMrdb,

@@ -36,7 +35,6 @@

 Cmdtab rebootmsg[] =

 {

-	CMhalt,		"halt",		1,

 	CMreboot,	"reboot",	0,

 	CMpanic,	"panic",	0,

 	CMrdb,		"rdb",		0,

@@ -749,9 +747,6 @@

 		}

 		ct = lookupcmd(cb, rebootmsg, nelem(rebootmsg));

 		switch(ct->index) {

-		case CMhalt:

-			reboot(nil, 0, 0);

-			break;

 		case CMreboot:

 			rebootcmd(cb->nf-1, cb->f+1);

 			break;