* Refactored logging system to use syslog(3) exclusively.
* Removed the 'Facility=', 'LogDirectory=', 'CoreDumpDirectory='
and 'LogPattern=' directives from rd.conf(5).
* Added a 'SaveFile' test method to the web API.
* Added a 'SaveString' test method to the web API.
* Refactored the multipart-mime parser in 'RDFormPost' to process
UTF-8 strings correctly.