Submit/craff patches

Here are four patches from me.

These are my first patches, sorry it they are not perfect. Some not:

the patch for urxvt-unicode-with-perl may be useless, but in the current state I could not 
install urxvt with its perl extension like tabs.

I also think heimdal should be cleanded up to support more than one version, but I am not sure, may be the latest version is enough.

Cheers,
Christophe