`sdmx_codelist ` and `global_codelist` fail due to wrong endpoint

[wachtermh]

Hi,

library(validate)

estat_codelist("CL_NA_STO", version = "1.16.0")

fails due to the wrong endpoint:

Error: retrieving data from 
'https://webgate.ec.europa.eu/fusionregistry/sdmx/v2//codelist/ESTAT/CL_NA_STO/1.16.0'
 failed with 'HTTP request failed with status: 500 '

validate:::sdmx_endpoint shows https://webgate.ec.europa.eu/fusionregistry/sdmx/v2/ and https://registry.sdmx.org/ws/public/sdmxapi/rest but it should be https://webgate.ec.europa.eu/fusionregistry/sdmx/v2/structure and https://registry.sdmx.org/sdmx/v2/structure.