fix commit "bsim4 version 7.0 in preparation of an update"
fix commit "bsim4 update to version 8.0"

which invalidated commit
"b3ld.c, b4ld.c, b3v32ld.c: charge computation for MODEDCTRANCURCE instead of MODEDC"
revert comment changes in commit "bsim4 version 7.0 in preparation of an update"
revert whitespace changes in commit "bsim4 update to version 8.0"
revert whitespace changes in commit "bsim4 version 7.0 in preparation of an update"