plans for include/c subdirs

[Gabriel Dos Reis]

Benjamin Kosnik <bkoz@redhat.com> writes:

| The current include directories for "C" headers exist:
| 
| include/c/		"C" bits in global, standard-bits using std::foo
| include/c_std/ 		shadow header work
| 
| As part of the evolution of the "C" header compatibility work, I'm
| proposing the following:
| 
| include/c/		include "C" headers, no changes, no using decls
| include/c_std/		"C" bits in global, standard-bits using std::foo
| include/c_shadow/ 	shadow header work

Great! Go for it (I've always found the naming a bit confusing).
Please, just add a note in the docs saying which becomes which since
the older include/c_std/ will no longer mean what it used to. 

-- Gaby
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