This information is not explicitly published via "courierauthconfig
--configfiles". However, if you build courier-authlib twice, and install it
into two separate directory trees (e.g. with --prefix), you should end up
with two sets of libraries, including the client library libcourierauth.a.
This will have the path to the socket hardwired.
So when you build courier-imap, you have to set LD_RUN_PATH and/or
LD_LIBRARY_PATH to the location of the directory where you installed the
libraries, and PATH to the location of the bin/ directory which contains
courierauthconfig, then you can pick up the authentication library of your