Many old open PRs

[Hadrian Zbarcea]

There are a number of old, even very old, PRs open [1]. Some I suspect 
are not relevant anymore. It'd be great if somebody could look into them 
and close them down. I will try to find some time next week and help 
with that as well.

Cheers,
Hadrian
[1] https://github.com/apache/activemq/pulls