[MVMA] Nightly 2023-05-06 has new naming scheme and new metrics access

[Chuck NC8Q]

All:

Yesterday's Nightly has a new naming scheme.
The name now includes a YYYYMMDD.
e.g.
aredn-20230506-175d23e-ath79-mikrotik-mikrotik_routerboard-sxt-5hpnd-squashfs-sysupgrade.bin

Additionally, easier access to metrics are available.
Simply post-fix 'metrics' after '/cgi-bin/' in your web browser
on a node running that Nightly or later.
e.g.
http://nc8q-sxt5hp-146.local.mesh:8080/cgi-bin/metrics

73, Chuck