Compare database server ports using 'eq' instead of with '=='. Avoids warnings when the port is an empty string.
Compare database server ports using 'eq' instead of with '=='. Avoids
warnings when the port is an empty string.

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