This update for pam and sudo fixes the following issue:

pam:

- pam_xauth: do not *free* a string which has been successfully passed to *putenv*. (bsc#1177858)
- Initialize the local variable *daysleft* to avoid a misleading warning for password expire days. (bsc#1178727)
- Run /usr/bin/xauth using the old user's and group's identifiers. (bsc#1174593)

sudo:

- Fix a problem with pam_xauth which checks effective and real uids to get the real identity of the user. (bsc#1174593)

This update was imported from the SUSE:SLE-15:Update update project.