[FEATURE][!!!][CONF] Deprecate various RTE configuration properties

This feature is a first step at simplifying the RTE configuration.

 * Deprecate various, mostly legacy properties, and restructure
   some others in order to make the configuration structure more
   homogeneous.
 * Remove any deprecated properties from the default RTE
   configurations.
 * Provide an Install tool upgrade wizard for substituting some
   of the deprecated properties by their replacement properties and
   reporting the uid's of pages that specify deprecated properties
   that could not be replaced by the wizard; the wizard warns that
   some deprecated properties may be specified in included external
   files; those will need to be updated by the user.
 * Log to the deprecation log any usage of deprecated properties. Allow to
   disable logging of deprecated properties by setting Page
   TS Config property RTE.default.logDeprecatedProperties.disabled = 1.
   Allow to optionally log also to the BE log by setting
   RTE.default.logDeprecatedProperties.logAlsoToBELog = 1.

Change-Id: I3992d308702500ea39a2e7944eea687150995791
Resolves: #28325
Releases: 4.6
Reviewed-on: http://review.typo3.org/3425
Reviewed-by: Stanislas Rolland
Tested-by: Stanislas Rolland
Reviewed-by: Georg Ringer