bui-network-config package file broken after move to gitlab
The problem is that you can no longer clone from GitLab because of the incorrect use of URL prefix (they use https instead of git). Instead you have to retrieve the tarball. The following new/updated lines appear to work:
BUI_NETWORK_CONFIG_VERSION = master
BUI_NETWORK_CONFIG_SOURCE = archive.tar.gz
BUI_NETWORK_CONFIG_SITE = https://gitlab.com/xbui/bui-network-config/repository/
This should go in src/buildroot/packages/2015.02/bui-network-config.