Support executing with multiple namespaces #7
Description
It would be really convenient to support joining multiple namespaces together when doing an exec. Right now, I either have to duplicate environment variables between namespaces or chain functions together..
envy exec A envy exec B envy exec C ....
Took a quick look at the code and it seemed like it would be pretty easy to support something like this by turning [namespace] into a comma separated list. Thoughts?