Apply bbox to part of "addresses" query

[nexces]

Adding parenthesis around additional conditions allows to use index and prevents from selecting all rows from DB containing "addr:housename" or "addr:unit".

Fixes #3937

Changes proposed in this pull request:

• Adding parenthesis around additional conditions

Test rendering with links to the example places:
No changes in rendering

[jeisenbe]

Thank you @nexces. I have tested and approve these changes. It's hard to see the performance difference with a moderate-sized extract (Latvia.osm.pbf) but I suspect it would be more significant with a larger extract or whole planet file.

[nexces]

You can perform further checks with pure query grabbed from PostgreSQL slow query log. Run "EXPLAIN" on it and you will find how costs are distributed. Also original query returns points that are outside of bounding box which is irrelevant for rendering but has massive impact on data gathering. For Europe+Russia extract data collection went from ~45 seconds to 0.4 seconds

[jeisenbe]

Thank you for that advice (I need to learn more about PostgreSQL), and for submitting for this PR.

It would be very helpful if we had an automated or semi-automated way to test performance, to prevent bugs like this in the future. There's an open issue #1287 - perhaps you have an idea about solving this?