Restrict port range

[joakimr-axis]

Describe your changes

Let the ACAP framework choose the user to run as, and restrict the port range to allow setting non-privileged ports only (or there would be permission issues).

Checklist before requesting a review

• I have performed a self-review of my own code
• I have verified that the code builds perfectly fine on my local system
• I have added tests that prove my fix is effective or that my feature works
• I have commented my code, particularly in hard-to-understand areas
• I have verified that my code follows the style already available in the repository
• I have made corresponding changes to the documentation

[joakimr-axis]

Let's separate running as the ACAP framework determined user and restricting the port range to the user range, keeping the current setup with user/group set to sdk.