[PATCH 1/2] Document cache information sysconf variables

[Siddhesh Poyarekar]

On Wednesday 18 October 2017 11:19 AM, Rical Jasan wrote:
>>  @item _SC_XOPEN_VERSION
>>  @standards{X/Open, unistd.h}
>>  Inquire about the parameter corresponding to @code{_XOPEN_VERSION}.
> 
> Otherwise, LGTM.

Thanks, pushed with nits fixed.

Siddhesh