Description of problem:
I have attached the /home volume previously used in FC20 installation to a 
fresh install of FC24 from xfce live cd disk. The relabelling does not help.
All actions the lightdm tries to perform on ~/.xsession-errors.* files denied by targeted SELinux policy
SELinux is preventing lightdm from 'unlink' accesses on the file .xsession-errors.old.

*****  Plugin catchall_labels (83.8 confidence) suggests   *******************

If you want to allow lightdm to have unlink access on the .xsession-errors.old file
Then you need to change the label on .xsession-errors.old
Do
# semanage fcontext -a -t FILE_TYPE '.xsession-errors.old'
where FILE_TYPE is one of the following: abrt_var_cache_t, alsa_home_t, antivirus_home_t, audio_home_t, auth_cache_t, auth_home_t, cache_home_t, cgroup_t, chrome_sandbox_home_t, config_home_t, cvs_home_t, data_home_t, dbus_home_t, etc_runtime_t, faillog_t, fetchmail_home_t, fonts_cache_t, gconf_home_t, git_user_content_t, gkeyringd_gnome_home_t, gkeyringd_tmp_t, gnome_home_t, gpg_secret_t, gstreamer_home_t, home_bin_t, home_cert_t, httpd_user_content_t, httpd_user_htaccess_t, httpd_user_ra_content_t, httpd_user_rw_content_t, httpd_user_script_exec_t, icc_data_home_t, iceauth_home_t, irc_home_t, irc_tmp_t, irssi_home_t, kdbusfs_t, kismet_home_t, krb5_home_t, krb5_host_rcache_t, local_login_home_t, locale_t, mail_home_rw_t, mail_home_t, mandb_home_t, mozilla_home_t, mozilla_plugin_tmp_t, mozilla_plugin_tmpfs_t, mpd_home_t, mpd_user_data_t, mplayer_home_t, mysqld_home_t, openshift_var_lib_t, pam_var_console_t, pam_var_run_t, polipo_cache_home_t, polipo_config_home_t, procmail_home_t, pulseaudio_home_t, rlogind_home_t, rssh_ro_t, rssh_rw_t, sandbox_file_t, screen_home_t, spamc_home_t, speech-dispatcher_home_t, ssh_home_t, svirt_home_t, systemd_home_t, systemd_passwd_var_run_t, telepathy_cache_home_t, telepathy_data_home_t, telepathy_gabble_cache_home_t, telepathy_logger_cache_home_t, telepathy_logger_data_home_t, telepathy_mission_control_cache_home_t, telepathy_mission_control_data_home_t, telepathy_mission_control_home_t, telepathy_sunshine_home_t, texlive_home_t, thumb_home_t, tvtime_home_t, uml_ro_t, uml_rw_t, user_fonts_cache_t, user_fonts_config_t, user_fonts_t, user_home_t, user_tmp_t, var_auth_t, virt_content_t, virt_home_t, vmware_conf_t, vmware_file_t, wine_home_t, wireshark_home_t, xauth_home_t, xdm_home_t, xdm_lock_t, xdm_log_t, xdm_rw_etc_t, xdm_spool_t, xdm_tmpfs_t, xdm_var_lib_t, xdm_var_run_t, xkb_var_lib_t, xserver_log_t.
Then execute:
restorecon -v '.xsession-errors.old'


*****  Plugin catchall (17.1 confidence) suggests   **************************

If you believe that lightdm should be allowed unlink access on the .xsession-errors.old file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'lightdm' --raw | audit2allow -M my-lightdm
# semodule -X 300 -i my-lightdm.pp

Additional Information:
Source Context                system_u:system_r:xdm_t:s0-s0:c0.c1023
Target Context                system_u:object_r:var_t:s0
Target Objects                .xsession-errors.old [ file ]
Source                        lightdm
Source Path                   lightdm
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.13.1-191.21.fc24.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.8.8-200.fc24.x86_64 #1 SMP Tue
                              Nov 15 19:41:51 UTC 2016 x86_64 x86_64
Alert Count                   1
First Seen                    2016-11-30 03:00:00 MSK
Last Seen                     2016-11-30 03:00:00 MSK
Local ID                      33cbfc52-6ba6-4d38-a072-f3bb83ad04a0

Raw Audit Messages
type=AVC msg=audit(1480464000.908:228): avc:  denied  { unlink } for  pid=1284 comm="lightdm" name=".xsession-errors.old" dev="dm-2" ino=1717315 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_t:s0 tclass=file permissive=0


Hash: lightdm,xdm_t,var_t,file,unlink

Version-Release number of selected component:
selinux-policy-3.13.1-191.21.fc24.noarch

Additional info:
reporter:       libreport-2.7.2
hashmarkername: setroubleshoot
kernel:         4.8.8-200.fc24.x86_64
type:           libreport