use rune/case instead of tr.  in many cases it doesn't matter, but it is easier to
audit for correctness this way.

Reference: /n/atom/patch/applied/runecaseify
Date: Mon Sep 28 07:55:15 CES 2015
Signed-off-by: quanstro@quanstr.net

--- /rc/bin/etheroui	Mon Sep 28 07:54:20 2015
+++ /rc/bin/etheroui	Mon Sep 28 07:54:21 2015
@@ -1,8 +1,7 @@
 #!/bin/rc
 rfork e
 for(i){
-	i=`{echo $i|
-		tr 'A-Z' 'a-z' |
+	i=`{rune/case $i|
 		sed 's/[^a-f0-9]//g
 		    s/(......).*/\1/g'}
 	look $i /lib/oui
--- /rc/bin/wwnoui	Mon Sep 28 07:54:23 2015
+++ /rc/bin/wwnoui	Mon Sep 28 07:54:24 2015
@@ -1,8 +1,7 @@
 #!/bin/rc
 rfork e
 for(i){
-	i=`{echo $i|
-		tr 'A-Z' 'a-z' |
+	i=`{rune/case $i |
 		sed 's/^.(......).*/\1/g'}
 	look $i /lib/oui
 }
--- /rc/bin/usbid	Mon Sep 28 07:54:26 2015
+++ /rc/bin/usbid	Mon Sep 28 07:54:27 2015
@@ -60,7 +60,7 @@
 
 if(! ~ $#* 0){
 	{
-		for(i in `{echo $* | tr 'A-Z' 'a-z'})
+		for(i in `{rune/case $*)
 			echo $i
 	} | verbose 1
 	exit ''
--- /rc/bin/stock	Mon Sep 28 07:54:29 2015
+++ /rc/bin/stock	Mon Sep 28 07:54:30 2015
@@ -2,7 +2,8 @@
 
 stock=ALU
 
-if(! ~ $#* 0) stock=`{echo $*|tr a-z A-Z|sed 's/ /+/g'}
+if(! ~ $#* 0)
+	stock=`{echo $*|rune/case|sed 's/ /+/g'}
 
 hget 'http://download.finance.yahoo.com/d/quotes.csv?s='^$stock^'&f=snl1d1c1v&e=.exe' |
 	sed 's/ +"/"/;s/
//' |