We now rely more on Jedis to select the appropriate Redis database and we no longer select the database when opening/closing a connection. Previously, we always reset the database if a database index greater zero was configured.
A properly configured Jedis pool ensures that the appropriate database is selected even if the database was selected during connection interaction.
Relying on Jedis reduces the number of issued SELECT commands and improves that way overall performance when executing commands via the Template API.
Original Pull Request: #291
aa4d784df0