Cleaning up some typos in the scripts and putting common variables in a single location

First of all, all the work I've done is in the rsyslog dir. I can do the same of the others. 

The typo thingie is just some small stuff in the scripts. 

The reason I created config.sh is initially because, i must admit, I was annoyed at having to chase down which scripts use the gpg key. But, it also makes it easier when we want to add more platforms and branches: it is just one file to monkey with.

If you like the idea, next time I will move config.sh one level so all directories can get to it.