Merge branch 'v2.3-regtest-modules' into v2.3

regtest/Makefile

regtest/adjmat/rt-dfg-wcsurf/config

regtest/adjmat/rt-dfg1/config

regtest/adjmat/rt-dfg2/config

regtest/adjmat/rt-dfg3/config

regtest/adjmat/rt-hbond/config

regtest/adjmat/rt-sprint/config

regtest/adjmat/rt-sums/config

regtest/crystallization/rt-average-vec/config

regtest/crystallization/rt-averaged-q6-lowmem/config

regtest/crystallization/rt-averaged-q6/config

regtest/crystallization/rt-dumpmulti/config

regtest/crystallization/rt-grad/config

regtest/crystallization/rt-nbonds-q6-lowmem/config

regtest/crystallization/rt-nbonds-q6/config

regtest/crystallization/rt-q6-lowmem/config

regtest/crystallization/rt-q6-lq6-around/config

regtest/crystallization/rt-q6-subset/config

regtest/crystallization/rt-q6/config

regtest/crystallization/rt-simplecubic/config