version up : groonga 4.0.6.

also add a temporary patch to respect more tokens in natural language mode.

component/groonga/buildout.cfg

@@ -11,9 +11,13 @@ extends =
 
 [groonga]
 recipe = slapos.recipe.cmmi
-version = 4.0.5
+version = 4.0.6
 url = http://packages.groonga.org/source/groonga/groonga-${:version}.tar.gz
-md5sum = a30fd8674c3a1cf4a6589acfb54f83ed
+md5sum = d7eb0296b0b759d1856c31b6288670fa
+# temporary patch to respect more tokens in natural language mode.
+patches =
+  ${:_profile_base_location_}/groonga.patch#9ed02fbe8400402d3eab47eee149978b
+patch-options = -p1
 configure-options =
   --disable-static
   --disable-glibtest

component/groonga/groonga.patch

+diff --git a/lib/ii.c b/lib/ii.c
+index d10b84d..e20bdce 100644
+--- a/lib/ii.c
++++ b/lib/ii.c
+@@ -5695,7 +5695,9 @@ grn_ii_similar_search(grn_ctx *ctx, grn_ii *ii,
+     ? (optarg->similarity_threshold > GRN_HASH_SIZE(h)
+        ? GRN_HASH_SIZE(h)
+        : optarg->similarity_threshold)
+-    : (GRN_HASH_SIZE(h) >> 3) + 1;
++    : (GRN_HASH_SIZE(h) < 8
++       ? GRN_HASH_SIZE(h)
++       : ((GRN_HASH_SIZE(h) - 8) >> 3) + 8);
+   if (GRN_HASH_SIZE(h)) {
+     grn_id j, id;
+     int w2, rep;