[Qgis-developer] Way to define another plugin directory?

[luca_manganelli at comune.trento.it]

Hi, the default plugin directory of QGIS are:

- the plugin directory inside QGIS install
- the plugin directory in your home directory

it would be nice to add another plugin directories, i.e. in a shared
folder, defined by an environment variable, i.e.

QGIS_ADDITIONAL_PLUGINDIR = ...........

any idea?