osmo-hnbgw: fix cmdline: do not force-disable colored logging

Un-jam the commandline option to disable color: it is so far stuck in
--disable-color and overrides everything so that we never see any colored
logging from osmo-hnbgw, whichever cmdline or cfg we pass.

Change-Id: I00400b626925fa9da707ad6679d8448941dbfa98
diff --git a/src/hnbgw.c b/src/hnbgw.c
index e40996f..31498cd 100644
--- a/src/hnbgw.c
+++ b/src/hnbgw.c
@@ -377,7 +377,7 @@
 } hnbgw_cmdline_config = {
 	0,
 	"osmo-hnbgw.cfg",
-	true,
+	false,
 	false,
 	0,
 	NULL,