core: Add notes about supporting non-HTTP(S) protocols
core: Add notes about supporting non-HTTP(S) protocols

We don’t support them, but if we did it would be by implementing a second
UhmServer and modifying the existing one to share code with the new one.

Distrotech/uhttpmock,MathieuDuponchelle/uhttpmock,MathieuDuponchelle/uhttpmock,MathieuDuponchelle/uhttpmock,pwithnall/uhttpmock,Distrotech/uhttpmock,pwithnall/uhttpmock