searchPath should be case-sensitive

[wubzz]

Previously {searchPath: 'TEST'} would result in test rather than TEST.

Fixes #1751

[smithamax]

This seems to have broken multiple search paths. 'knex,public' becomes set search_path to "knex,public" but should be set search_path to "knex","public" I think.

[wubzz]

That makes sense, didn't have a single thought relating two multiple search paths. Can you open a new issue?

Also I think the syntax in that case should be ['knex', 'public'] instead of knex,public.

[wubzz]

Issue #2335