The libnetworking is excluded from the Doxygen output. Exclude also the
nfsclient source code, otherwise there are some orphaned Doxygen groups.
Update #3706.
Add a general purpose test suite for validation tests.
This is the first test suite generated from a specification item in the
rtems-central repository.
Update #3959.
Generate Doxygen output in doc and ignore this directory in Git. Add
RTEMS logo. The Doxygen documentation is now built using the source
tree. Just invoke "doxygen" in the top-level source directory.
The Doxyfile works also with at least Doxygen 1.8.13 and Doxygen 1.8.14.
Update #3705.
