Utterly embarrassing...  This fixes the "and"s as well as downcases
"A" to "F".

Reference: /n/sources/patch/sorry/upcase_etheraddr
Date: Sat May 14 12:08:18 CES 2005

--- /sys/src/libip/parseether.c	Sat May 14 12:06:49 2005
+++ /sys/src/libip/parseether.c	Sat May 14 12:06:39 2005
@@ -4,7 +4,7 @@
 int
 parseether(uchar *to, char *from)
 {
-	char nip[4];
+	char nip[3];
 	char *p;
 	int i;
 
@@ -13,9 +13,13 @@
 		if(*p == 0)
 			return -1;
 		nip[0] = *p++;
+		if (nip[0] >= 'A' && nip[0] <= 'F')
+			nip[0] |= ' ';
 		if(*p == 0)
 			return -1;
 		nip[1] = *p++;
+		if (nip[1] >= 'A' && nip[1] <= 'F')
+			nip[1] |= ' ';
 		nip[2] = 0;
 		to[i] = strtoul(nip, 0, 16);
 		if(*p == ':')