You can specify zero or more repository names to use when releasing a project.
The -releaserepo instruction aggregates the -releaserepo property and all properties that start with -releaserepo.. This makes it possible to set release repository names in different places.
If the -releaserepo instruction is set to the empty value, then releasing a project does nothing. If the -releaserepo instruction is unset, then releasing a project will release it to the first writable repository.