Slightly modify the regular expression used to recognize multi-species databases (again, patch from Andy).
Slightly modify the regular expression used to recognize multi-species
databases (again, patch from Andy).

at7/ensembl,Ensembl/ensembl,at7/ensembl,james-monkeyshines/ensembl,danstaines/ensembl,james-monkeyshines/ensembl,mjg17/ensembl,james-monkeyshines/ensembl,mjg17/ensembl,at7/ensembl,willmclaren/ensembl,muffato/ensembl,willmclaren/ensembl,muffato/ensembl,mjg17/ensembl,Ensembl/ensembl,muffato/ensembl,danstaines/ensembl,muffato/ensembl,at7/ensembl,james-monkeyshines/ensembl,danstaines/ensembl,Ensembl/ensembl,mjg17/ensembl,Ensembl/ensembl