Session class name clashes with PHP class

Fix: generating URLs

Fix: make pretty URLs absolute

Fix: make pretty URLs absolute

Fix: routing fails for URLs with port number. Add support for built-in server with pretty URLs.

Need absolute URLs. e.g. in sitemaps

Username/password in URLs need to have special characters escaped

Generate absolute URLs

Strict typing

Fix: #2649 - Fix routing for FAQ module

Strict types

Working on request/base URL logic

Working on routing; Code cleanup