[DOCS] Some minor error fixes

[Peter Eisentraut]

Please look at the following errors/fixes.

I've applied 2, 3, 4, 5.

1 was correct according to my math. (115.9-9.8)/100000*1000*1000 = 1061

6 looked too complicated to me. ;-) Can you explain where you got your
number from?

[Alexander Law]

Thank you, Peter.

Regarding 1, you're right, I didn't see "per row" in that sentence and
decided that it was total overhead (and then again I should change nsec
to msec).

Regarding 6, please look at the old documentation:
http://www.postgresql.org/docs/9.1/static/pgcrypto.html#PGCRYPTO-HASH-SPEED-TABLE
It contains "crypt-bf/5 | 211" in the table and "john -test shows 213
loops/sec for crypt-bf/5" below the table. (The difference is 2 loops
per second).

Current documentation:
https://www.postgresql.org/docs/current/static/pgcrypto.html#PGCRYPTO-HASH-SPEED-TABLE
contains:
"crypt-bf/5 13504" in the table (number is increased with the faster
CPU) and still "john -test shows 213 loops/sec for crypt-bf/5" below the
table.
So I propose to change 213 below the table to 13504 + 2 (previous
difference).
Or maybe we should rerun all the benchmarks and update all the numbers
(see commit d6464fdc).

Best wishes,
Alexander

Post by Peter Eisentraut

Please look at the following errors/fixes.

I've applied 2, 3, 4, 5.
1 was correct according to my math. (115.9-9.8)/100000*1000*1000 = 1061
6 looked too complicated to me. ;-) Can you explain where you got your
number from?