[FROG] new config

[Randy Bush]

i manage/generate router configs centrally and push/expect them out to
devices.  first time sorting how to do this with frr.

my mental model would be to rsync a new `/etc/frr/frr.conf` to the
target and ask it to be loaded in some way.  but reading the page on
`frr-reload.py`, that does not seem to be the expected model.  so what
is the expected model?

do i essentially push to new config to, e.g. `/etc/frr/frr.new` and then
run `frr-reload.py --reload /etc/frr/frr.new`, and it will update
`/etc/frr/frr.conf`?

thanks for clue.

randy