[sqlite] attach db limit

[Richard Hipp]

On 3/3/16, John McKown <john.archie.mckown at gmail.com> wrote:
>  Why 125 would be a good question.

The maximum value of an signed 8-bit integer is 127.  Take away two
for the "main" and "temp" databases.

-- 
D. Richard Hipp
drh at sqlite.org