+0.6.0:
+ * Use UCL instead xml for configuration (https://github.com/vstakhov/libucl)
+ * Fix statistics module normalization
+ * Rework the many modules for the new configuration:
+ - surbl has incompatible configuration;
+ - fuzzy_check has incompatible configuration;
+ - multimap has now new configuration;
+ - received_rbl is removed and replaced by rbl module.
+ * Removed deprecated options:
+ - statfile_pool_size;
+ - action and required/reject score for a metric.
+ * Simplify build system and unify configuration for all platforms.
+ * Improved URL detector (reduced false positive rate).
+ * Lua 5.2 is now the default and fully supported version.
+ * Tons of bugfixes and minor improvements.
+
0.5.6:
* Fix bug with counters incrementing in rolling history
* Detect expl and exp2l as some systems do not have it