Description of problem:
After entering httpd SSL certificate passphrase, I obtain messages


===journal errors===
machine systemd[1]: Failed to start The Apache HTTP Server.
-- Subject: L'unità httpd.service è fallita
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- L'unità httpd.service è fallita.
-- 
-- Il risultato è failed.
dic 18 16:49:51 machine systemd[1]: httpd.service: Unit entered failed state.
dic 18 16:49:51 machine systemd[1]: httpd.service: Failed with result 'exit-code'.
dic 18 16:49:51 machine polkitd[769]: Unregistered Authentication Agent for unix-process:2832:42670 (system bus name :1.56, object path /org/freedesktop/PolicyKit1/Authentic
lines 1220-1242/1242 (END)


===# systemctl status httpd.service -l===
● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since ven 2015-12-18 16:49:51 CET; 2min 59s ago
  Process: 2839 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE)
 Main PID: 2839 (code=exited, status=1/FAILURE)

dic 18 16:49:45 machine systemd[1]: Starting The Apache HTTP Server...
dic 18 16:49:45 machine httpd[2839]: AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using fe80::feaa:14ff:fec6:6341. Set the 'ServerName' directive globally to suppress this message
dic 18 16:49:51 machine systemd[1]: httpd.service: Main process exited, code=exited, status=1/FAILURE
dic 18 16:49:51 machine systemd[1]: Failed to start The Apache HTTP Server.
dic 18 16:49:51 machine systemd[1]: httpd.service: Unit entered failed state.
dic 18 16:49:51 machine systemd[1]: httpd.service: Failed with result 'exit-code'.




Version-Release number of selected component (if applicable):
httpd-2.4.17-3.fc23.x86_64


Additional info:
SELinux is actually disabled