Make XML-RCP configurable in example scripts
- Improvement: Automatically enable TCP, if XML-RPC is requested
- Improvement: Allow the configuration of TCP-Children (especially for XML-RPC)
- Improvement: Add missing configuration information
modules/rls: added support for escaped chars in rls-services document
path: support SPVE in add_path*() and add second parameter

This includes a major rewrite and code cleanup of prepend_path(), which
doesn't perform any other functional changes.