Update SELinux policy to allow UDP for multicast repl in galera.

policy/selinux/README

 Note: The included SELinux policy files can be used for MariaDB Galera cluster.
 However, since these policies had been tested for a limited set of scenarios,
-it is highly recommended to run SELinux in "permissive" mode even with these
-policies installed and report any denials on mariadb.org/jira.
+it is highly recommended that you run mysqld in "permissive" mode even with
+these policies installed and report any denials on mariadb.org/jira.
 
 
 How to generate and load the policy module of MariaDB Galera cluster ?
-
-* Generate the SELinux policy module.
+  * Generate the SELinux policy module.
     # cd <source>/policy/selinux/
     # make -f /usr/share/selinux/devel/Makefile mariadb-server.pp
 
-* Load the generated policy module.
+  * Load the generated policy module.
     # semodule -i /path/to/mariadb-server.pp
 
-* Lastly, run the following command to allow 4568.
+  * Lastly, run the following command to allow tcp/4568 and udp/4567.
     # semanage port -a -t mysqld_port_t -p tcp 4568
+    # semanage port -a -t mysqld_port_t -p udp 4567
 
+How to run mysqld in permissve mode ?
+  # semanage permissive -a mysqld_t

policy/selinux/mariadb-server.te

@@ -5,7 +5,7 @@ module mariadb-server 1.0;
 
 require {
 	type user_tmp_t;
-	type kerberos_port_t;
+	#type kerberos_master_port_t;
 	type mysqld_safe_t;
 	type tmp_t;
 	type tmpfs_t;
@@ -32,7 +32,10 @@ require {
 	class dir { write search getattr add_name read remove_name open };
 
 # MariaDB additions
+	type kerberos_port_t;
 	type tram_port_t;
+	type mysqld_port_t;
+	class udp_socket name_bind;
 	class process setpgid;
 	class netlink_tcpdiag_socket { create nlmsg_read };
 }
@@ -56,8 +59,8 @@ allow mysqld_t tmpfs_t:file { write getattr read create unlink open };
 allow mysqld_t fixed_disk_device_t:blk_file { read write open };
 allow mysqld_t ifconfig_exec_t:file { read execute open execute_no_trans getattr };
 
-#This rule allows connecting on 4444
-allow mysqld_t kerberos_port_t:tcp_socket { name_bind name_connect };
+#This rule allows connecting on 4444/4567/4568
+#allow mysqld_t kerberos_master_port_t:tcp_socket { name_bind name_connect };
 
 allow mysqld_t mysqld_safe_t:dir { getattr search };
 allow mysqld_t mysqld_safe_t:file { read open };
@@ -82,8 +85,13 @@ allow mysqld_t bin_t:file { getattr read execute open execute_no_trans ioctl };
 
 # MariaDB additions
 allow mysqld_t self:process setpgid;
-# This rule allows port 4567
+# This rule allows port tcp/4444
+allow mysqld_t kerberos_port_t:tcp_socket { name_bind name_connect };
+# This rule allows port tcp/4567 (tram_port_t may not be available on
+# older versions)
 allow mysqld_t tram_port_t:tcp_socket name_bind;
+# This rule allows port udp/4567 (see README)
+allow mysqld_t mysqld_port_t:udp_socket name_bind;
 
 # Rules related to XtraBackup
 allow mysqld_t self:netlink_tcpdiag_socket { create nlmsg_read };