dh_installpam: Install conf files under /usr/lib/pam.d
PAM supports the usual stateless "distro conf in /usr/lib
with user
override in /etc
" since version 1.2.0 (March 2015, upstream commit
10b83ef224a5e9c3e2663b3f08dd17090acc58ab).
This commit makes dh_installpam
install PAM conf files under
/usr/lib/pam.d
instead of /etc/pam.d
.