Improve environment variable names
While documenting various environment variables, I encountered several that have very generic names that could be improved by making them more descriptive. Many are involved in the QM interface, but there are others. Some of the env. vars. that could be made more explicit (in my opinion) are:
Even prefixing them with GMX_ and some indication of how they're used (e.g. GMX_QM_ORCA_BASE instead of BASENAME, GMX_ENER_VERBOSE instead of VERBOSE, etc) would make them much better. I will suggest this for inclusion in 5.0/master to avoid largely cosmetic changes to the code.