Notify when gEnv look-up fails
Merge branch 'master' of https://root.cern.ch/git/root
   Fixes for the 'dynamic' startup:
   - Set client flag so that VerifyDataSet can be submitted as parallel
   - SAve arguments to EnablePackage so that they can be used when replaying the issued commands
   - In stressProof: when in 'dyn' mode, skip some new tests which do not apply.
Replace "strlen(x) != 0" by the more performant version "x[0]"
Replace !strlen(x) by the more performant !x[0]
Use getters where relevant; make nested class public
Use getters where relevant; make nested class public
Merge branch 'master' of https://root.cern.ch/git/root