Define a lower wal_autocheckpoint for script value DBs.
Define a lower wal_autocheckpoint for script value DBs.

Per comment by @VisualKei on #1879.

Fixes #2036

Martii/greasemonkey,the8472/greasemonkey,Ventero/greasemonkey,HasClass0/greasemonkey,Ventero/greasemonkey,the8472/greasemonkey,Martii/greasemonkey,HasClass0/greasemonkey