Support for basic authentication for module developers setting up web services would be of great help. I believe this can be done through the use of annotations.
Associated mailing list discussion: https://groups.google.com/a/openmrs.org/d/msg/dev/PH9Z1fQrox8/zwRPsGr5o_cJ
Pull Request: https://github.com/openmrs/openmrs-core/pull/249
I would like to request that this feature be backported to 1.9.x