Version 2.1.6-release, 24 feb 2014

fixed #1857, crash in arabic stemmer
fixed #1875, fixed crash on adding documents with long words in dict=keyword index with morphology and infixes enabled
fixed #1876, crash on words with large codepoints and infix searches
fixed #1880, crash on multiquery with one incorrect query
fixed #1882, race of periodic and forced FLUSHing on an RT index
fixed #1881, quorum syntax with '.' as blended char
fixed evaluating of LCS by an expression ranker
fixed #1864, indexer crash on badly formed JSON, e.g. '[,1,2,3,4,]'
fixed #1853, incomplete ORDER BY JSON attribute in distributed indexes
fixed #1847, broken infix searches in RT indexes
fixed #1844, clash of mix cased attribute and field names at CSV source
fixed #1840, filter by @uservar in distributes indexes
fixed #1832,#1833,#1834, some big endianess issues
fixed #1830, loss of ondisk_attrs after rotation
fixed #1762, memory leak in regexp_filter
fixed #1759, indextool false positives on persistent MVA checking
fixed GROUP BY id
fixed crash on sending empty snippet result
fixed index corruption in UPDATE queries with non-existent attributes