Added some change from DEV

- Pinned unit version to prevent suprises with configuration changes
- Added psql client for manage.py dbshell
- Set LANG to "C.UTF8" to correctly read configuration files

env/netbox.env

@@ -15,6 +15,7 @@ EMAIL_USERNAME=netbox
 EMAIL_USE_SSL=false
 EMAIL_USE_TLS=false
 HOUSEKEEPING_INTERVAL=86400
+LANG=C.UTF-8
 MAX_PAGE_SIZE=1000
 MEDIA_ROOT=/opt/netbox/netbox/media
 METRICS_ENABLED=false