SElinux blocks PostgreSQL startup

Issue

• With selinux enforcing, I can't start postgresql. Turning selinux off (setenforce 0), I can start it.
• Postfix won't start up anymore when bound to localhost. Postfix complains with "fatal: config variable inet_interfaces: host not found: localhost" for example in the log, if you have "inet_interfaces = localhost".
• After patching my server, /etc/nsswitch.conf is mislabeled:

[root@host ~]# ls -Z /etc/nsswitch.conf 
-rw-r--r--  root root user_u:object_r:rpm_script_tmp_t /etc/nsswitch.conf