I just added the commandline option --Connection <server-name> to cotvnc. This allows to start a connection using a stored connection.
I have to admit that I don't have much clue about what I did as this is the first time ever I used XCode or the language you used to implement. I simply added by searching the source and copying code snippets that I thought should fit. So there should absolutely someone review my code. But before that: How should I submit the code?