Security fix for the ALT Linux 8 package shadow version 1:4.2.1-alt7.M80P.1

1:4.2.1-alt7.M80P.1 built March 13, 2017 Mikhail Efremov in task 179286 --- March 7, 2017 Mikhail Efremov - Backported from upstream git: + Fix a resource leak in syslogsg. + Fix a resource leak in libmis/idmapping.c. + Free memory on error path. - Fix user busy errors at userdel patch from Fedor...