Features
[895c518] Enabled ESI caching for blog index (@sergiu-popa)
[c696935] Ignore requests from referrers with the same HTTP host when redirecting to preferred locale (@bocharsky-bw)
[994ce20] Improved our database to allow using other engines (such as PostgreSQL) (@lyrixx, @javiereguiluz)
[96bbeae] Made error pages translatable (@bocharsky-bw)
Fixes
[e064efe] Removed locale duplicates in array of locales (@bocharsky-bw)
[aaeb675] Disabled HTMLPurifier caching (voronkovich)
[bfc76fc] Remove a useless check before calling "is_granted" (@voronkovich)
Internationalization
[62a4648] Translated HTTP error pages to Ukrainian (@bocharsky-bw)
[1214c48] Translated HTTP error pages to Russian (@bocharsky-bw)
[f3e95de] Translated HTTP error pages to Spanish (@javiereguiluz)