changed RDBO_DEBUG flag to RDBO_DEBUG_ON; view_lantronix_log function - unfinished; hilis4.fcgi checks for CENTRE env var and checks pidfile before creating new
changed LIMS::RDBO Rose debugging flags to require RDBO_DEBUG env param to be set - eg lims_server.pl, locally in test scripts, or export console ENV param
replaced multiple calls to load config settings with LIMS:Local::Config->instance(), using Class::Singleton to ensure config file opened & read only once at server startup
