osmo-nitb: change default db name to sms.db

libvlr now delegates subscriber management to osmo-hlr, so the database no
longer represents a HLR. It basically only stores SMS, so reflect that fact in
the default database name.

Change-Id: I3289d68d3eb63aff940b48a25b584d5e83cd0197
diff --git a/src/osmo-nitb/bsc_hack.c b/src/osmo-nitb/bsc_hack.c
index 89bbb5e..21585e5 100644
--- a/src/osmo-nitb/bsc_hack.c
+++ b/src/osmo-nitb/bsc_hack.c
@@ -57,7 +57,7 @@
 
 /* MCC and MNC for the Location Area Identifier */
 struct gsm_network *bsc_gsmnet = 0;
-static const char *database_name = "hlr.sqlite3";
+static const char *database_name = "sms.db";
 static const char *config_file = "openbsc.cfg";
 static const char *rf_ctrl_path = NULL;
 extern const char *openbsc_copyright;