Hi Lars,
I agree on your observation about the documentation of the ODBC topic.
I will discuss with our colleagues at documentation but for the mean time, I have recorded a video for the SAP HANA Academy on configuring ODBC for Linux (RHEL and SLES). Hope this will provide some clarification.
SAP HANA Installations - SPS 08 - YouTube
Denys van Kempen, SAP HANA Academy