Merge remote-tracking branch 'origin/v2.3' into v2.3

regtest/metainference/rt-bayesgje/BIAS.0.reference

regtest/metainference/rt-bayesgje/BIAS.1.reference

regtest/metainference/rt-bayesgje/allforce.0.reference

regtest/metainference/rt-bayesgje/allforce.1.reference

regtest/metainference/rt-bayesgje/allforce.2.reference

regtest/metainference/rt-bayesgje/allforce.3.reference

regtest/metainference/rt-bayesgje/config

regtest/metainference/rt-bayesgje/forces.0.reference

regtest/metainference/rt-bayesgje/forces.1.reference

regtest/metainference/rt-bayesgje/plumed.dat

regtest/metainference/rt-bayesspe/BIAS.0.reference

regtest/metainference/rt-bayesspe/BIAS.1.reference

regtest/metainference/rt-bayesspe/allforce.0.reference

regtest/metainference/rt-bayesspe/allforce.1.reference

regtest/metainference/rt-bayesspe/allforce.2.reference

regtest/metainference/rt-bayesspe/allforce.3.reference

regtest/metainference/rt-bayesspe/config

regtest/metainference/rt-bayesspe/forces.0.reference

regtest/metainference/rt-bayesspe/forces.1.reference

regtest/metainference/rt-bayesspe/plumed.dat