Log Message:
textproc/robodoc: update to 4.99.6

Some of the changes since 3.2.3:

April 2003 - V4.0.0
 o Support for XML DocBook output.
 o A new tool, robohdrs, is included -- it can insert empty headers
   in the source code.
 o Support for cascading style sheets (CSS) in HTML mode.
 o Complete rework of the commandline interface.
 o ROBODoc can now work with directories and subdirectories,
   and does not need xref files anymore.
 o All documentation can be created with a single command, you
   no longer need a makefile to create your documentation.
 o The manual is now in docbook format and much more extensive.
 o Lots of refactoring, code should be easier to extend and understand
   now.
 o There is now some design documentation.
 o Support for single file and multiple file documentation.
 o Dropped support for Amiga Guide format.
 o More unittests.
 o Support for packaging under RedHat and OS-X
 o C++ and C examples have been removed.