review FindBerkelyDB.cmake

[Alexander Neundorf]

Hi,

I had a look at FindBerkeleyDB.cmake.
It's a very simply file, that's good.

In the error message it says it could not find berkeley db >= 4.1, but I don't 
see any version checking in the find-module.
The only thing which hints at version 4 is the suffix /db4.

So, does db.h exist only since version 4 ?
Doesn't sound like it.
But if that's the case, would it make sense either to rename the file to 
FindBerkeleyDB.cmake, or to add real version support to it ?

Alex