Avoid generic filenames such as util.h #321
Description
Description
Building duo_unix leads to having util.h in the build which will be dropped in the include folder upon installation.
The filename is trivial and can easily conflict with other files of the same name.
Expected Behavior
Please verify if util.h is needed at all in the release build and if so rename it e.g. duo_util.h.
Actual Behavior
util.h is saved in the /usr/include folder.
Reference
The matter was discussed here as well: #110