manual: describe subscriber import by SQL
It seems a bad idea to cement the internal SQL structure in the user manual,
but since we currently lack a safe and portable import mechanism (like CSV
import in osmo-hlr-db-tool), this is currently valuable info to users.
Change-Id: I3246e6d5364215a71c33b5aca876deab7b6cfd70
diff --git a/doc/manuals/chapters/running.adoc b/doc/manuals/chapters/running.adoc
index ff75c7f..1f1bcdc 100644
--- a/doc/manuals/chapters/running.adoc
+++ b/doc/manuals/chapters/running.adoc
@@ -54,7 +54,7 @@
Alternatively, you may use the `osmo-hlr-db-tool`, which is installed along
with `osmo-hlr`, to bootstrap an empty database, or to migrate subscriber data
-from an old 'OsmoNITB' database. See `osmo-hlr-db-tool --help`.
+from an old 'OsmoNITB' database. See <<db_import_nitb>>.
=== Multiple instances