Tiny update to pg_stat_statements documentation - Mailing list pgsql-hackers

Hi,

I noticed that the pg_stat_statements documentation doesn't include
the necessary config parameter setting "compute_query_id = on" in the
"typical usage" (so if you just used those existing typical usage
settings, the tracking wouldn't actually work).
I've attached a patch for this.

Regards,
Greg Nancarrow
Fujitsu Australia