if species left blank, hub->url misses the prefixed forward slash, making the link wrong
if species left blank, hub->url misses the prefixed forward slash, making the link wrong

Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode,Ensembl/ensembl-webcode