Follow up to the patch for the BUG#10491.

mysql-test/r/ps_1general.result:
  Update result file.
mysql-test/r/ps_2myisam.result:
  Update result file.
mysql-test/r/ps_3innodb.result:
  Update result file.
mysql-test/r/ps_4heap.result:
  Update result file.
mysql-test/r/ps_5merge.result:
  Update result file.
tests/mysql_client_test.c:
  Fix test -- after field changing character set to utf8 in the server,
  length should be calculated differently.

mysql-test/r/ps_1general.result

@@ -468,7 +468,7 @@ def					table	253	64	2	Y	0	31	8
 def					type	253	10	3	Y	0	31	8
 def					possible_keys	253	4096	0	Y	0	31	8
 def					key	253	64	0	Y	0	31	8
-def					key_len	253	4096	0	Y	128	31	63
+def					key_len	253	1365	0	Y	0	31	8
 def					ref	253	1024	0	Y	0	31	8
 def					rows	8	10	1	Y	32928	0	63
 def					Extra	253	255	14	N	1	31	8
@@ -484,7 +484,7 @@ def					table	253	64	2	Y	0	31	8
 def					type	253	10	5	Y	0	31	8
 def					possible_keys	253	4096	7	Y	0	31	8
 def					key	253	64	7	Y	0	31	8
-def					key_len	253	4096	1	Y	128	31	63
+def					key_len	253	1365	1	Y	0	31	8
 def					ref	253	1024	0	Y	0	31	8
 def					rows	8	10	1	Y	32928	0	63
 def					Extra	253	255	27	N	1	31	8

mysql-test/r/ps_2myisam.result

@@ -1158,7 +1158,7 @@ def					table	253	64	2	Y	0	31	8
 def					type	253	10	3	Y	0	31	8
 def					possible_keys	253	4096	0	Y	0	31	8
 def					key	253	64	0	Y	0	31	8
-def					key_len	253	4096	0	Y	128	31	63
+def					key_len	253	1365	0	Y	0	31	8
 def					ref	253	1024	0	Y	0	31	8
 def					rows	8	10	1	Y	32928	0	63
 def					Extra	253	255	0	N	1	31	8

mysql-test/r/ps_3innodb.result

@@ -1158,7 +1158,7 @@ def					table	253	64	2	Y	0	31	8
 def					type	253	10	3	Y	0	31	8
 def					possible_keys	253	4096	0	Y	0	31	8
 def					key	253	64	0	Y	0	31	8
-def					key_len	253	4096	0	Y	128	31	63
+def					key_len	253	1365	0	Y	0	31	8
 def					ref	253	1024	0	Y	0	31	8
 def					rows	8	10	1	Y	32928	0	63
 def					Extra	253	255	0	N	1	31	8

mysql-test/r/ps_4heap.result

@@ -1159,7 +1159,7 @@ def					table	253	64	2	Y	0	31	8
 def					type	253	10	3	Y	0	31	8
 def					possible_keys	253	4096	0	Y	0	31	8
 def					key	253	64	0	Y	0	31	8
-def					key_len	253	4096	0	Y	128	31	63
+def					key_len	253	1365	0	Y	0	31	8
 def					ref	253	1024	0	Y	0	31	8
 def					rows	8	10	1	Y	32928	0	63
 def					Extra	253	255	0	N	1	31	8

mysql-test/r/ps_5merge.result

@@ -1201,7 +1201,7 @@ def					table	253	64	2	Y	0	31	8
 def					type	253	10	3	Y	0	31	8
 def					possible_keys	253	4096	0	Y	0	31	8
 def					key	253	64	0	Y	0	31	8
-def					key_len	253	4096	0	Y	128	31	63
+def					key_len	253	1365	0	Y	0	31	8
 def					ref	253	1024	0	Y	0	31	8
 def					rows	8	10	1	Y	32928	0	63
 def					Extra	253	255	0	N	1	31	8
@@ -4222,7 +4222,7 @@ def					table	253	64	2	Y	0	31	8
 def					type	253	10	3	Y	0	31	8
 def					possible_keys	253	4096	0	Y	0	31	8
 def					key	253	64	0	Y	0	31	8
-def					key_len	253	4096	0	Y	128	31	63
+def					key_len	253	1365	0	Y	0	31	8
 def					ref	253	1024	0	Y	0	31	8
 def					rows	8	10	1	Y	32928	0	63
 def					Extra	253	255	0	N	1	31	8

tests/mysql_client_test.c

@@ -7564,7 +7564,9 @@ static void test_explain_bug()
   else
   {
     verify_prepare_field(result, 6, "key_len", "", MYSQL_TYPE_VAR_STRING, "", 
-                         "", "", NAME_LEN*MAX_KEY, 0);
+                         "", "",
+                         NAME_LEN*MAX_KEY / my_charset_utf8_general_ci.mbmaxlen,
+                         0);
   }
 
   verify_prepare_field(result, 7, "ref", "", MYSQL_TYPE_VAR_STRING,