==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.2
- Linux/BSD distribution name and version:  ubuntu 14.04
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MySQL
- Web server (Apache or Nginx): Apache2
- Manage mail accounts with iRedAdmin-Pro? No
- Related log if you're reporting an issue: 
========

I ask to forgive for my bad English.

At the iRedMail-0.9.2 installation on "pure, fresh" the ubuntu 14.04 server, at the very end of installation there is a mistake

********************************************************************
* Start iRedMail Configurations
********************************************************************
[ INFO ] Create self-signed SSL certification files (2048 bits).
[ INFO ] Generate a strong, unique Diffie Hellman Group with openssl, please wait.
[ INFO ] Create required system account: vmail, iredadmin, iredapd.
[ INFO ] Configure Apache web server and PHP.
[ INFO ] Configure PHP.
[ INFO ] Configure MySQL database server.
[ INFO ] Setup daily cron job to backup SQL databases: /var/vmail/backup/backup_mysql.sh
[ INFO ] Configure Postfix (Message Transfer Agent).
[ INFO ] Configure Cluebringer (postfix policy server).
[ INFO ] Configure Dovecot (pop3/imap/managesieve server).
[ INFO ] Configure ClamAV (anti-virus toolkit).
[ INFO ] Configure Amavisd-new (interface between MTA and content checkers).
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
[ INFO ] Configure SpamAssassin (content-based spam filter).
[ INFO ] Configure iRedAPD (postfix policy daemon).
[ INFO ] Configure iRedAdmin (official web-based admin panel).
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
[ INFO ] Configure Fail2ban (authentication failure monitor).
[ INFO ] Configure Roundcube webmail.
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
[ INFO ] Configure SOGo Groupware (Webmail, Calendar, Address Book, ActiveSync).
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
[ INFO ] Configure Awstats (logfile analyzer for mail and web server).

*************************************************************************
* iRedMail-0.9.2 installation and configuration complete.
*************************************************************************

In former releases of such mistake wasn't.

Prompt please in what there can be a problem? It is a problem of ubuntu, or your package?

Prompt where to look to reveal a mistake.