Zero-pad MAC addresses in sysvars

It seems more common to print MAC addresses in zero-padded format.

common/sysvars.c

@@ -213,7 +213,7 @@ static const char *sysvar_mac_tostr(sysvar_t from, char *buf)
     if (!m)
 	return NULL;
 
-    snprintf(buf, MAC_BUFLEN, "%x:%x:%x:%x:%x:%x",
+    snprintf(buf, MAC_BUFLEN, "%02x:%02x:%02x:%02x:%02x:%02x",
 	     m[0], m[1], m[2], m[3], m[4], m[5]);
     return buf;
 }

esp32/max80/src/common/sysvars.c

@@ -213,7 +213,7 @@ static const char *sysvar_mac_tostr(sysvar_t from, char *buf)
     if (!m)
 	return NULL;
 
-    snprintf(buf, MAC_BUFLEN, "%x:%x:%x:%x:%x:%x",
+    snprintf(buf, MAC_BUFLEN, "%02x:%02x:%02x:%02x:%02x:%02x",
 	     m[0], m[1], m[2], m[3], m[4], m[5]);
     return buf;
 }

fpga/max80.qpf

@@ -19,12 +19,12 @@
 #
 # Quartus Prime
 # Version 22.1std.2 Build 922 07/20/2023 SC Lite Edition
-# Date created = 19:17:55  September 30, 2023
+# Date created = 19:21:31  September 30, 2023
 #
 # -------------------------------------------------------------------------- #
 
 QUARTUS_VERSION = "22.1"
-DATE = "19:17:55  September 30, 2023"
+DATE = "19:21:31  September 30, 2023"
 
 # Revisions