Fix error message (running "./build.sh docs" automatically adds missing translations, so the only file that needs to be changed manually is _message_en.prop, and then the other files only when translating; untranslated entries have a # as the first character in the value)

"Bump up the sequence cache size from 64 to 1024.
 Prevents sequence writing from becoming a bottleneck when doing bulk load."

Prevents sequence writing from becoming a bottleneck when doing bulk load.

We already have the MAX_MEMORY_ROWS setting which does a very similar thing, and is better documented.

In server mode, appending ";autocommit=false" to the database URL was working, but the return value of Connection.getAutoCommit() was wrong.

Issue 558: with the MVStore, a NullPointerException could occur when using LOBs at session commit (LobStorageMap.removeLob).