msgb talloc ctx: initialize in all main() scopes

Add msgb_talloc_ctx_init() call to many main() functions still lacking a
msgb talloc context.

Change-Id: Ib0d6751260659cabf18a7ce80680ba2fb4228ea1
diff --git a/openbsc/src/ipaccess/ipaccess-config.c b/openbsc/src/ipaccess/ipaccess-config.c
index 453877b..3c2d6cc 100644
--- a/openbsc/src/ipaccess/ipaccess-config.c
+++ b/openbsc/src/ipaccess/ipaccess-config.c
@@ -853,6 +853,7 @@
 	int rc, option_index = 0, stream_id = 0xff;
 
 	tall_ctx_config = talloc_named_const(NULL, 0, "ipaccess-config");
+	msgb_talloc_ctx_init(tall_ctx_config, 0);
 
 	osmo_init_logging(&log_info);
 	log_parse_category_mask(osmo_stderr_target, "DNM,0");