FTL v2.9.2

New

• Database: Automatically remove queries that are older than x days (with x being user-definable, defaulting to 365 days) #89
• Add binary for powerpc arch (Thanks to @mterron!) #88

Tweaks

• Add unique_clients to API statistics (to be used on the dashboard in a separate pull request) #90

Fix

• Catch quite unlikely, but nevertheless possible memory allocation error #92