Issue with PostgreSQL version mismatch during OpenVAS installation on Debian #16

While attempting to install OpenVAS on Debian, I encountered an issue where the installation process tries to start the postgresql@15-main service. However, when attempting to install PostgreSQL, it installs the postgresql@17-main service instead, causing a version mismatch.

Steps to reproduce:

1- Install OpenVAS on Debian.

2- During installation, OpenVAS attempts to start postgresql@15-main.

3- PostgreSQL 17 is installed by default, and the service postgresql@17-main is started instead.

4- This results in a version mismatch and prevents OpenVAS from starting properly.

Temporary solution:
I manually edited the installation script to change the service reference from postgresql@15-main to postgresql@17-main, which resolved the issue.

Expected behavior:
OpenVAS should either support PostgreSQL 17 or automatically reference the correct version of PostgreSQL for the installation process.

Additional context:
It would be great if the installation script could be updated to account for newer versions of PostgreSQL, or if there's a check to ensure compatibility with the installed version.