rtems: Generate <rtems/extension.h>

Remove the duplicated description which is an out dated copy and paste
from the Classic API Guide.  Instead, thoroughly document the individual
extensions.

Change license to BSD-2-Clause according to file histories and
documentation re-licensing agreement.

Update #3899.
Update #3993.
This commit is contained in:
Sebastian Huber
2021-09-15 07:50:43 +02:00
parent 606c9a642a
commit 466cd91744
File diff suppressed because it is too large Load Diff