[sql] Import reference version of SQLite 3.10.2.

third_party/sqlite/sqlite-src-3100200/ext/rtree/rtree_util.tcl

 # 2008 Feb 19
 #
 # The author disclaims copyright to this source code.  In place of
 # a legal notice, here is a blessing:
 #
 #    May you do good and not evil.
 #    May you find forgiveness for yourself and forgive others.
 #    May you share freely, never taking more than you give.
 #
 #***********************************************************************
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       append ret [rtree_nodetreedump $db $zTab "$zIndent  " [expr $iDepth-1] $i]
     }
   }
   set ret
 }
 
 proc rtree_treedump {db zTab} {
   set d [rtree_depth $db $zTab]
   rtree_nodetreedump $db $zTab "" $d 1
 }