osmo-gtphub.cfg: fix conflict with osmo-sgsn.cfg

Change bind-to-sgsns from 127.0.0.1 to 127.0.0.10, so osmo-gtphub's
default config does not conflict with the osmo-sgsn default config. The
value of bind-to-ggsns does not clash with osmo-ggsn's config, so it was
left unchanged.

Related: OS#3369
Change-Id: Id892e1f4ab2daabbe9824b819b5fed985373b97a
diff --git a/doc/examples/osmo-gtphub/osmo-gtphub.cfg b/doc/examples/osmo-gtphub/osmo-gtphub.cfg
index 0dc4150..0bb63e3 100644
--- a/doc/examples/osmo-gtphub/osmo-gtphub.cfg
+++ b/doc/examples/osmo-gtphub/osmo-gtphub.cfg
@@ -8,7 +8,7 @@
 gtphub
  ! Local addresses to listen on and send from, each on standard ports
  ! 2123 and 2152. Setting these addresses is mandatory.
- bind-to-sgsns 127.0.0.1
+ bind-to-sgsns 127.0.0.10
  bind-to-ggsns 127.0.0.2
 
  ! Local nonstandard ports or separate IPs: