Set rootpass to mac:hexraw

roles/netbootxyz/templates/menu/systemrescue.ipxe.j2

@@ -6,6 +6,7 @@ goto ${menu} ||
 set os System Rescue
 set os_arch ${arch}
 isset ${rootpass_enabled} || set rootpass_enabled false
+set rootpass ${mac:hexraw}
 iseq ${os_arch} x86_64 && set os_arch amd64 ||
 iseq ${os_arch} i386 && set os_arch i686 ||
 menu ${os}
@@ -16,7 +17,7 @@ item --gap ${os} Versions
 iseq ${os_arch} {{ value.arch }} && item {{ value.version }}_${os_arch} ${space} ${os} {{ value.version }} ||
 {% endif %}
 {% endfor %}
-item rootpass_mac Enable rootpass=MAC_ADDRESS [ enabled: ${rootpass_enabled} ]
+item rootpass_mac Enable rootpass=${rootpass} [ enabled: ${rootpass_enabled} ]
 choose live_version || goto live_exit
 goto ${live_version}
 
@@ -31,7 +32,7 @@ goto boot
 
 :rootpass_mac
 clear params
-iseq ${rootpass_enabled} true && set rootpass_enabled false || set rootpass_enabled true && set params rootpass=${netX/mac}
+iseq ${rootpass_enabled} true && set rootpass_enabled false || set rootpass_enabled true && set params rootpass=${rootpass}
 goto live_menu
 
 :boot