It includes the correct buildlink3.mk file from either Linux-PAM
(security/PAM) or OpenPAM (security/openpam) and eventually will
support solaris-pam. pam.buildlink3.mk will:
* set PAMBASE to the base directory of the PAM files;
* set PAM_TYPE to the PAM implementation used.
There are two variables that can be used to tweak the selection of
the PAM implementation:
PAM_DEFAULT is a user-settable variable whose value is the default
PAM implementation to use.
PAM_ACCEPTED is a package-settable list of PAM implementations
that may be used by the package.
Modify most packages that include PAM/buildlink3.mk to include
pam.buildlink3.mk instead.
