Make a URL non-breaking

[Helen Borrie]

Example:

For documentation and more information, visit http://freeadhocudf.org 

breaks across the end of a line like this:

For documentation and more information, visit http://
freeadhocudf.org.

It seems the slash character behaves like a breaking hyphen but I can't seem to find out how to fix this! 

Sorry, the live links were put there by my email client.  At the moment, I'm not seeking to put live links in the Frame document.  It would be OK to have them if there were no other option, though.

Thanks,
Helen