URI validation and cleanup

A node with a "cck redirect field" in use redirects a URI as expected. However when the information text "This node is redirected to a remote URI." is displayed the link (which encompasses the section of text "remote URI") unexpectedly points http:// instead of the expected /foo/bar

e.g. If "/foo/bar" is the set value for a cck redirect field, the href value for the text "remote URI" will have "http://" pre-appended. The resulting href value would end up being "http://foo/bar/".

Of note regarding the above example; there are are only two forward slashes and not three as would be expected if "/foo/bar" was concatenated to "http://" (e.g. http:///foo/bar). As it stands it appears the leading slash is removed from the URI.

Reproduction steps:

• Modify content type "Page"
• Add a new cck field for cck redirect
• Edit or create page node and enter a URI (e.g. without http://)
• Save the page, the resulting page will display the text "This node is redirected to a remote URI."
• Click the link "remote URI"