[X2Go-Dev] misc nx patches

[Reinhard Tartler]

Hi,

This patchset contains a number of miscellaneous patches that implement
both bugfixes and code cleanups in the master branch. I imagine that
some of them might be controversal, but I am personally convinced that
the current code becomes easier to work with this way.

Please review them and say with which of them you disagree. I intend to
apply the rest next week.

Cheers,
Reinhard