Log Message:
Update textproc/sphinxsearch to 2.2.9.

- fixed #2190, incorrect GROUP BY outer JSON object
- fixed #2197, TRUNCATE fails to remove disk chunk files after calling
  OPTIMIZE
- fixed #2199, invalid packedfactors JSON output for index with stopwords
- fixed #2203, legacy API SELECT list
- fixed #2201, crash with string comparison at expressions and expression
  ranker
- fixed #2196, .NET connector issue (UTC_TIMESTAMP() support)
- fixed #2144, query parser crash vs multiforms with heading numbers
- fixed #2228, removed searchd shutdown behavior on failed connection
- fixed #2220, aliased JSON elements support
- fixed #2122, id64 daemon failed to load RT disk chunk with kill-list
  from id32 build
- fixed #2208, ZONESPANLIST() support for RT indexes
- fixed #1979, snippets generation and span length and lcs calculation
  in proximity queries
- fixed truncated results (and a potential crash) vs long enough
  ZONESPANLIST() result