The stock php parse_url() function doesn't work for sqlite://filename URLs

Created by: jlfranklin

When setting the $database variable to point to a SQLite database, we'd like to use something more like a file:// URL. However, the parse_url() function special cases how file:// is interpreted, and won't apply the same rules to sqlite:// URLs.

The SQLite driver needs to add the ability to parse its own URLs.