Reinstate ability to pass -D command lines, regressed in 1.31.
Reinstate ability to pass -D command lines, regressed in 1.31.

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