NSS modules (except nss_files and nss_dns) should be split into individual subpackages. This will slightly reduce the size of the minimum installation, and it will allow us to build nss_nis and related modules against libtirpc instead of glibc in a future version with minimal impact on package dependencies and upgrades. We probably needs a glibc-nss-devel subpackage as well, which contains the .so symbolic links (and this package should depend on all the glibc NSS subpackages).