Config for plugin and jdbc directories

According to the docs, there is a teamcity.data.path config in the teamcity-startup.properties file. Is there support for similar configs for setting the plugins and jdbc connector directory? Our use case is that we have installed the plugins and jdbc connector in a directory outside of the teamcity root data directory. We mount an external disk as the teamcity root, and would like to use plugins / jdbc from outside this directory without having to move or mount the directories.