[uri] Fix outdated comment in parse_uri()

Signed-off-by: Marty Connor <mdc@etherboot.org>

src/core/uri.c

 		return NULL;
 	raw = ( ( ( char * ) uri ) + sizeof ( *uri ) );
 
-	/* Zero URI struct and copy in the raw string */
+	/* Copy in the raw string */
 	memcpy ( raw, uri_string, raw_len );
 
 	/* Start by chopping off the fragment, if it exists */