doc: add example osmo-hnbgw.cfg

Note that all *.cfg files are added to 'make dist' by the
doc/examples/Makefile.am.

Change-Id: I424ccdea02578edc7816e4d23a9ea7c5729315d8
diff --git a/doc/examples/osmo-hnbgw.cfg b/doc/examples/osmo-hnbgw.cfg
new file mode 100644
index 0000000..1cc98c2
--- /dev/null
+++ b/doc/examples/osmo-hnbgw.cfg
@@ -0,0 +1,32 @@
+!
+! OsmoHNBGW (0) configuration saved from vty
+!!
+!
+log stderr
+  logging filter all 1
+  logging color 1
+  logging print category 0
+  logging timestamp 0
+  logging level all everything
+  logging level main debug
+  logging level hnbap debug
+  logging level sua debug
+  logging level rua debug
+  logging level ranap debug
+  logging level lglobal notice
+  logging level llapd notice
+  logging level linp notice
+  logging level lmux notice
+  logging level lmi notice
+  logging level lmib notice
+  logging level lsms notice
+  logging level lctrl notice
+  logging level lgtp notice
+  logging level lstats notice
+!
+line vty
+ no login
+!
+hnbgw
+ iuh
+  bind 192.168.0.132