Respond to requests to http://host:80/ as http://host/
Respond to requests to http://host:80/ as http://host/

This is also true for https://host:443/ https://host/

This works around some automation in error messages which generate URLs
with port numbers included.

FND/tiddlyspace,FND/tiddlyspace,TiddlySpace/tiddlyspace,TiddlySpace/tiddlyspace,FND/tiddlyspace,TiddlySpace/tiddlyspace