[3.0] demux: adaptive: fix bogus port discarding condition

(cherry picked from commit 6d65ec65)

On January 10, 2024, it was reported by John Cox jc@kynesim.co.uk on the vlc-devel mailing list that this is still an issue on 3.0. So backport the fix from 4.0.

modules/demux/adaptive/http/ConnectionParams.cpp

@@ -70,8 +70,8 @@ void ConnectionParams::setPath(const std::string &path_)
     if(!hostname.empty())
     {
         os << hostname;
-        if( (port != 80 && scheme != "http") ||
-            (port != 443 && scheme != "https") )
+        if( (port != 80 && scheme == "http") ||
+            (port != 443 && scheme == "https") )
             os << ":" << port;
     }
     os << path;