Serverified NetworkManager.conf setup for manual nmcli control only

NetworkManager.conf

[main]
plugins=ifcfg-rh

#
# "Serverify" NetworkManager behavior, ensuring it only does what we tell it via nmcli
#
# See man NetworkManager.conf for more details on settings below
#
#
# Do not create any connections automatically
#     The NetworkManager daemon stores "automatically ignored" (automatically
#     created interfaces which were manually deleted) interfaces in the file:
#         /var/lib/NetworkManager/no-auto-default.state
#     But since we are specifying no-auto-default=* here, that file won't
#     really matter. You can delete it if present, consolidating config here.
no-auto-default=*

# Do not monitor config files for changes and automatically apply them
#     This is the traditional operation of network config files, change file, restart
#     network or ifup/ifdown etc.
monitor-connection-files=false

# Allow creating connections on interfaces with no link (cable unplugged)
#     It's very annoying to try and turn up a multiple NICs and you cannot assign
#     a connection to a physical device because there is no link yet
ignore-carrier=*

# Do not touch /etc/resolv.conf or start dnsmasq
dns=none