How to wildcard search with colons?

[Brian Whitman]

The field is called "trackURL" and has a URL in it, the type is  
"string." I want to be able to search for http://host*

q=trackURL:http* <-- works
q=trackURL:http://host* <-- doesn't work, the query parser removes  
the : and everything after it
q=trackURL:http%3A//host* <-- doesn't work, same as above
q=trackURL:http*host* <-- TooManyClauses exception, not what I want  
anyway