Update default config

Rename default config to match the binary name and add config exampe.

Change-Id: Iabfc78c95e904af7372f10c195b2b979675d34f3
Related: SYS#2655
diff --git a/doc/examples/osmo-sysmon.cfg b/doc/examples/osmo-sysmon.cfg
new file mode 100644
index 0000000..933df93
--- /dev/null
+++ b/doc/examples/osmo-sysmon.cfg
@@ -0,0 +1,5 @@
+ctrl-client bsc 127.0.0.1 4249
+ get-variable bts_connection_status
+ get-variable msc.0.connection_status
+netdev eth0
+netdev tun0