Multiple personalities

[Daniel van Vugt]

This is interesting. Since r2408 we do indeed have legacy clients still 
working with newer library builds. So no obvious ABI break. But they 
work because they can load libmircommon.so.3&4 simultaneously.

So everything apparently still works, but I'm a little afraid there 
might be unseen risks with two versions of the same library in one process.

[https://bugs.launchpad.net/mir/+bug/1415321/comments/3]