[DOCS] Invalid reference to ForkNumber enum

[Alexander Law]

Hello,

There is an invalid reference to ForkNumber definition (from commit
f71939cd).
It was defined in relfilenode.h at time of the commit
(https://github.com/postgres/postgres/blob/f71939cd/src/include/storage/relfilenode.h),
but now it's defined in relpath.h
(https://github.com/postgres/postgres/blob/master/src/include/common/relpath.h).
Patch attached.

Best regards,
Alexander

[Tom Lane]

Post by Alexander Law
There is an invalid reference to ForkNumber definition (from commit
f71939cd).
It was defined in relfilenode.h at time of the commit
(https://github.com/postgres/postgres/blob/f71939cd/src/include/storage/relfilenode.h),
but now it's defined in relpath.h
(https://github.com/postgres/postgres/blob/master/src/include/common/relpath.h).
Patch attached.

Yup, that's an oversight. Pushed, thanks!

regards, tom lane