[PATCH] sys/tree.h: Add prototype and generate macros

[Konstantin Belousov]

On Thu, Jan 22, 2015 at 09:22:00AM +0100, Sebastian Huber wrote:
> Provide individual prototype and generate macros for the red-black tree.
> This helps to reduce code size in statically linked applications.
This looks at least innocent, and probably is useful in other cases as
well.

Would you update the man page ?  May be, the full list of subordinate
macros for RB_PROTOTYPE/GENERATE is not needed, but the feature should
be noted and header file referenced, at least.