Links and text don't match in last journal aio commit

[timfox]

Text and links in docs don't match in last commit

 <entry><link linkend="configuring.message.journal"
- >journal-buffer-reuse-size</link></entry>
+ >journal-aio-flush-on-sync</link></entry>
+ <entry>Boolean</entry>
+ <entry>TODO</entry>
+ <entry>False</entry>
+ </row>
+ <row>
+ <entry><link linkend="configuring.message.journal"
+ >journal-aio-buffer-timeout</link></entry>
 <entry>Long</entry>
- <entry>the journal will try and re use any buffers smaller than this
- size (in bytes)</entry>
- <entry>1024</entry>
+ <entry>TODO</entry>
+ <entry>20000</entry>
 </row>
 <row>
 <entry><link linkend="configuring.message.journal"
+ >journal-aio-buffer-size</link></entry>
+ <entry>Long</entry>
+ <entry>TODO</entry>
+ <entry>128 MiB</entry>
+ </row>
+ <row>

[timfox]

I know this is still TODO, but just a reminder.

We also need a section in the perf tuning chapter on how to tune buffer timeout, flush on sync, and buffer size, and when it's appropriate to use flush on sync and when it's not.