This is a bugfix and maintenance release. The main visible change is that osm2pgsql now works better together with connection poolers and similar database middleware: prepared statements now use protocol level prepare instead of PREPARE sql commands and there is a new option to explicitly create a primary key on flex tables.
Other fixes and features:
- check flat node file format for forwards compatibility to prepare for future changes of the flatnode file format
- fix two-stage processing when flat node file is used
- fix getting node locations in slim node with two-stage processing
- updated included libosmium, protozero and fmt libraries