data: add a server.conf example file

Add a server.conf example file, and install it to $(docdir)/examples.

data/Makefile.am

@@ -18,6 +18,12 @@ $(service_DATA): $(service_in_files) Makefile
 	$(edit) $< >$@
 endif
 
+examplesdir = $(docdir)/examples
+examples_DATA = server.conf
+
+server.conf: server.conf.in
+	$(edit) $< >$@
+
 edit = sed \
 	-e 's|@bindir[@]|$(bindir)|g' \
 	-e 's|@sbindir[@]|$(sbindir)|g' \

data/server.conf.in

@@ -0,0 +1,53 @@
+# This is a sample configuration file that could be edited and
+# dropped into @sysconfdir@/NetworkManager/conf.d to disable certain
+# bits of automatic behavior that might not be wanted on servers.
+
+[main]
+
+# Normally, if there is an ethernet device that is not matched by any
+# existing configured connection, NetworkManager will create a
+# "default" connection for that device, using automatic (DHCP/SLAAC)
+# IP configuration. You can use no-auto-default to disable this
+# behavior for individual devices or for all devices on the system
+#
+# Note that if you delete an existing "default" connection, NM will
+# remember this by adding the device's hardware address to
+# @localstatedir@/run/NetworkManager/no-auto-default.state; the devices
+# indicated in this file will be appended to the value of the
+# no-auto-default key.
+
+#no-auto-default=eth0,eth1
+#no-auto-default=11:22:33:44:55:66
+#no-auto-default=*
+
+
+# Normally, for device types that support carrier-detect, such as
+# Ethernet and InfiniBand, NetworkManager will only allow a connection
+# to be activated on the device if carrier is present (ie, a cable is
+# plugged in). You can set ignore-carrier to disable this behavior,
+# for individual devices or for all devices on the system.
+#
+# Note that the "carrier" property of NMDevices and device D-Bus
+# interfaces will still reflect the actual device state; it's just
+# that NetworkManager will not make use of that information.
+#
+# You should probably not set this to apply to devices where you are
+# doing automatic IP config, since they will eventually fail if there
+# is no actual network connectivity, and NetworkManager won't retry
+# them right away when carrier comes back up (since it's ignoring it).
+
+#ignore-carrier=eth0,ib0
+#ignore-carrier=aa:bb:cc:dd:ee:ff
+#ignore-carrier=*
+
+
+# Normally, NetworkManager adjusts /etc/resolv.conf to point to the
+# name servers associated with currently-active connections (either
+# manually-configured servers, or ones received via DHCP, etc).
+# Setting "dns=none" will turn off this behavior, and NetworkManager
+# will leave /etc/resolv.conf untouched. See NetworkManager.conf.5 for
+# more information about other values you can set this to.
+
+#dns=none
+
+