ndg: upgrade to v0.5.1

a previous unsuccessful release v0.5.0, introduced in f9b269a, contained
memleaks and deadlocks which are now resolved in v0.5.1.

see https://git.qcode.ch/nakamochi/ndg/releases/tag/v0.5.1

ndg/env

@@ -1,6 +1,6 @@
-NDG_VERSION=v0.4.0
-NDG_URL_AARCH64=https://git.qcode.ch/attachments/86e4f4fa-37a9-4d14-8fb2-92f3c36dc965
-NDG_SHA256_AARCH64=549268143caaa8bbdb6b2038fffe1baf92fce74bc2ff5a498f3fa3fd3b3292c7
+NDG_VERSION=v0.5.1
+NDG_URL_AARCH64=https://git.qcode.ch/attachments/2e5d401a-c465-46c7-a23c-dff0c3bb6910
+NDG_SHA256_AARCH64=d117226787b9c436104e886e62c8193b9fd2abb9a73a8f48a2a77510783ff9c0
 
 NDG_HOME=/home/uiuser
 NDG_BINDIR=$NDG_HOME/$NDG_VERSION
@@ -40,7 +40,7 @@ EOF
 
     cat <<EOF > $svdir/run.new
 #!/bin/sh
-exec $NDG_BINDIR/nd -gui $NDG_BINDIR/ngui -gui-user uiuser -wpa /var/run/wpa_supplicant/wlan0 2>&1
+exec $NDG_BINDIR/nd -conf /home/uiuser/conf.json -gui $NDG_BINDIR/ngui -gui-user uiuser -wpa /var/run/wpa_supplicant/wlan0 2>&1
 EOF
     chmod +x $svdir/run.new
     test -f $svdir/run && diff $svdir/run $svdir/run.new