pass the plugin config entry to the plugin init function
    
    A plugin init function can get the plugin config entry (that is, its own
    config entry) by using the pblock parameter SLAPI_PLUGIN_CONFIG_ENTRY
    int
    my_plugin_init(Slapi_PBlock *pb)
    {
      Slapi_Entry *my_config_entry = NULL;
      slapi_pblock_get(pb, SLAPI_PLUGIN_CONFIG_ENTRY, &my_config_entry);
    Reviewed by: nkinder, nhosoi (Thanks!)