Free Connections where noted

[pentix]

Mostly "todos"

Not sure if I am going to fix this, as we only lose a few hundred bytes per Connection and it's a real pain to ensure the absence of double-free errors. The typical user might not care, even after years...

See for example:

https://github.com/pentix/qjournalctl/blob/89eb50137dc0ec38d733eaa6d6bcc1f2fd2f7326/src/connectiondialog.cpp#L127