fix: several bugfixes for generated urls

[pi0]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

We were not handling many cases of difference between local-only / anyhost and a specific network interface IP listening causing misleading console output...

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

Merging #114 (d14eb18) into main (d671382) will increase coverage by 0.42%.
The diff coverage is 77.65%.

❗ Current head d14eb18 differs from pull request most recent head f8259b3. Consider uploading reports for the commit f8259b3 to get more accurate results

@@            Coverage Diff             @@
##             main     #114      +/-   ##
==========================================
+ Coverage   51.12%   51.55%   +0.42%     
==========================================
  Files          10       10              
  Lines        1639     1670      +31     
  Branches      122      128       +6     
==========================================
+ Hits          838      861      +23     
- Misses        801      809       +8     

Files Changed	Coverage Δ
src/_utils.ts	57.50% <75.60%> (-2.72%)	⬇️
src/listen.ts	82.33% <79.24%> (+2.40%)	⬆️