Updates in PowhegControl documentation
requested to merge atlas-physics/pmg/mcexperts/powheg-experts/athena:21.6-PowC_UpdateReadmeAndExamples into 21.6
The PowhegControl readme is updated to add more infos on the Pythia8 setting. The example shown there now uses the main31 routines. The example joboptions were also updated to use the main31 routine (except bblvlv where special settings are needed) and the following warning was added:
#--------------------------------------------------------------
# This is an example joboption to generate events with Powheg
# using ATLAS' interface. Users should optimise and carefully
# validate the settings before making an official sample request.
#--------------------------------------------------------------