subr.rtl/rtl_fetch.subr:{rtlp_fetch_url_git,rtl_fetch_urls_git}(): {receive,pass} ${_pkg_name}.
subr.rtl/rtl_fetch.subr:rtl_fetch_urls_git(): return 1 on failure from rtlp_fetch_url_git().
subr/pkg_fetch_download.subr: pass ${PKG_NAME} to rtl_fetch_urls_git().
etc/README.md: updated.