By using the new iniCutSection() function primarily, parse and consume
each .ini file section, reducing the search area (ini content/list) for each
section consumed.

The use of iniFreeStringList() intead of strListFree() appeared to have some
benefit to performance as well, likely due to a DLL heap dance.

This brought the file.ini file loading on Vertrauen (8518 lines) down from 10+
seconds (on Windows over SMB/1Gb link to a Samba sever) to less than one scond.