The problem is that PHP editions prior to 5.5 are not supported and my ISP needs to upgrade to PHP 5.6. On the other hand, I don't consider that I should upgrade a live online store to Magento CE 1.9.3 just for the sake of PHP 5.6, given that Magento CE 184.108.40.206 currently covers my own needs. Magento upgrade needs a lot of effort (especially the testing part), while I have a large number of extensions and also a Theme which I need to buy again, install and test them.
Hi @dandrikop, @Pronto is correct. The patch is only for security fixes. You'll need to upgrade to 1.9.3 if you want the improvements that come with that version, including support for PHP 5.6. Your alternative is to go through and make the needed changes manually using something like Inchoo's PHP 7 extension: http://inchoo.net/magento/its-alive/