net/: refactor cfg templates

Adopt "foreach" and "common_" features and generally take in the improved
templates as used at 35c3.

If your config file relies on the tmpl_std that is now removed, you can locally
resurrect it with

  git checkout 2c6a55baa72de0e -- tmpl_std

but it's probably better to make a new copy of config_2g3g and insert your
local config there.

Change-Id: Ie6352c584c0fce57c617387160c285abf40a5f90
diff --git a/net/templates/osmo-hnbgw.cfg b/net/templates/osmo-hnbgw.cfg
new file mode 100644
index 0000000..5559bdc
--- /dev/null
+++ b/net/templates/osmo-hnbgw.cfg
@@ -0,0 +1,15 @@
+${include(common_template_warning)}
+hnbgw
+ iuh
+  local-ip ${HNBGW_IP}
+  hnbap-allow-tmsi 1
+
+${foreach(LOG_OUTPUT)}
+log ${LOG_OUTPUTn_TYPE}
+${include(common_logging)}
+ logging level linp notice
+ logging level lss7 notice
+ logging level lsccp notice
+ logging level lsua notice
+ logging level lm3ua notice
+${foreach_end}