the leftover SUBCOMM from the 1st variation). For this, abcof was
adapted (now: abcof_soc.F90) to avoid problems with invsat(). Some
indexes changes in hsohelp.F90, so wann_socmat.F was changed as well.

...I hope this works. ...at some point we need a clear program logic
for this. Right now it is a nightmare. There are too many different
implicit cases one has to consider.

# Conflicts:
#   cmake/Files_and_Targets.txt

introduce ifdefs for chase

See merge request fleur/fleur!12

...This is to save the climate. :)