fix: check if ip address when sanitizing urls

[sebastiendan]

Description

This PR fixes the URL sanitization util function so that it checks if endpoint is an ip address (and doesn't use secure connections in that case).

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works