The above errors mean that ISPConfig is not installed completely on your server. It looks as you did not install the mysql client development files for mysql 5 before you updated ISPConfig.
Please make sure that you do not delete the 3 backup files created by the ispconfig installer in your /tmp directoyr. Copy them to a safe location in case we need them to restore your system.
Then install the mysql5 client development files and the mysql5 client pacakge from your linux distribution. The run:
and unpack and run the ISPConfig setup again. Also make sure that you add the log parameters in apache2.conf again that you commented out after ISPConfig jas been installed again.