I receive warnings when I updated to ISPconfig 3.1.13. IS there anything I can do about it?

Hi
As the header says, I received some warnings and I'm not sure how to proceed. If there is anything I can address, and if so, how? Or if they are perhaps nothing I should worry about at all?

These are the warnings:
PHP Warning: symlink(): No such file or directory in /tmp/update_stable.sh.1xVAX5ZYgo/ispconfig3_in stall/install/lib/installer_base.lib.php on line 2051
(...)
Updating Crontab
Restarting services ...
Failed to reload php-fpm.service: Unit not found.
PHP Warning: mysqli_connect(): Headers and client library minor version mismatch. Headers:50556 Lib rary:100134 in /tmp/update_stable.sh.1xVAX5ZYgo/ispconfig3_install/install/lib/mysql.lib.php on line 207
PHP Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* t o use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone ident ifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /tmp/update_stable.sh.1xVAX5ZYgo/ispconfig3_install/install/update.php on line 580


This is the output of htf_report.txt
(I haven't configured email services as I don't use them, so the smtp and mail related errors can probably be ignored)

##### SERVER #####
IP-address (as per hostname): ***.***.***.***
[WARN] could not determine server's ip address by ifconfig
[INFO] ISPConfig is installed.

##### ISPCONFIG #####
ISPConfig version is 3.1.13


##### VERSION CHECK #####

[INFO] php (cli) version is 5.4.16

##### PORT CHECK #####

[WARN] Port 465 (SMTP server SSL) seems NOT to be listening

##### MAIL SERVER CHECK #####

[WARN] I found no "submission" entry in your postfix master.cf
[INFO] this is not critical, but if you want to offer port 587 for smtp connections you have to enab
le this.
[WARN] I found no "smtps" entry in your postfix master.cf
[INFO] this is not critical, but if you want to offer SSL for smtp (not TLS) connections you have to
enable this.

##### RUNNING SERVER PROCESSES #####

[INFO] I found the following web server(s):
Unknown process (nginx (PID 1128)
[INFO] I found the following mail server(s):
Postfix (PID 1118)
[INFO] I found the following pop3 server(s):
Dovecot (PID 935)
[INFO] I found the following imap server(s):
Dovecot (PID 935)
[INFO] I found the following ftp server(s):
PureFTP (PID 1004)

##### LISTENING PORTS #####
(only ()
Local (Address)
[anywhere]:25 (1118/master)
[localhost]:953 (1010/named)
***.***.***.***:443 (1128/nginx
[anywhere]:993 (935/dovecot)
[anywhere]:995 (935/dovecot)
[localhost]:10024 (1222/amavisd)
[localhost]:9000 (920/php-fpm
[localhost]:10025 (1118/master)
[localhost]:10026 (1222/amavisd)
[localhost]:10027 (1118/master)
[localhost]:9070 (928/php-fpm
[anywhere]:110 (935/dovecot)
[localhost]:9071 (912/php-fpm
[anywhere]:143 (935/dovecot)
[localhost]:9072 (927/php-fpm
[anywhere]:8080 (1128/nginx
[anywhere]:80 (1128/nginx
[anywhere]:8081 (1128/nginx
[anywhere]:8082 (1128/nginx
***.***.***.***:53 (1010/named)
[localhost]:53 (1010/named)
[anywhere]:21 (1004/pure-ftpd)
[anywhere]:22 (913/sshd)
*:*:*:*::*:25 (1118/master)
*:*:*:*::*:953 (1010/named)
*:*:*:*::*:993 (935/dovecot)
*:*:*:*::*:995 (935/dovecot)
*:*:*:*::*:10024 (1222/amavisd)
*:*:*:*::*:10026 (1222/amavisd)
*:*:*:*::*:3306 (992/mysqld)
[localhost]10 (935/dovecot)
[localhost]43 (935/dovecot)
*:*:*:*::*:8080 (1128/nginx
*:*:*:*::*:8081 (1128/nginx
*:*:*:*::*:53 (1010/named)
*:*:*:*::*:21 (1004/pure-ftpd)
*:*:*:*::*:22 (913/sshd)


##### IPTABLES #####
Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination




Best regards,
Rikard