My Redmine instance does not exist anymore.
The few things of "value" were kind of archived at:
https://github.com/nohal/OpenCPN/wiki/Redmine-InlandECDIS-Support
https://github.com/nohal/OpenCPN/wiki/Redmine-Rasterization-Rules-Editor
https://github.com/nohal/OpenCPN/wiki/Redmine-Implementing-a-missing-symbol