[FROG] /etc vs /usr/local/etc

[Randy Bush]

fwiw, from no previous hands on with frr, i now have is-is and bgp v4
and v6 peerings up against junos and ios/xr routers and running quite
happily

color me impressed

still a lot to learn, of course.  this evening's nit is why does the
result of `show running-config` and a `write mem` differ from
`/etc/frr/frr.conf` in minor ways, such as

    % diff -u sh-run frr.conf 
    --- sh-run      2024-05-05 16:25:30
    +++ frr.conf    2024-05-05 16:24:13
    @@ -3,8 +3,8 @@
     hostname r3.dfw.rg.net
     log syslog informational
     service password-encryption
    -hostname r3
    -domainname dfw.rg.net
    +hostname r2
    +domainname iad.rg.net
     service integrated-vtysh-config

randy