This changeset belongs to the fix of Bug#735 Prepared Statements: there is no support for Query Cache

- Create "--ps-protocol" and no "--<whatever>-protocol" variants of the former tests
  t/grant_cache.test and t/query_cache_sql_prepare.test.
- Some additional subtest and fixes of bugs
- Minor improvements 


mysql-test/include/grant_cache.inc:
  - Rename mysql-test/t/grant_cache.test to include/grant_cache.inc
  - Toplevel scripts running variants of this test are
       t/grant_cache_ps_prot.test (runs only with "--ps-protocol")
       t/grant_cache_no_prot.test (skipped if any protocol is assigned)
  - Modifications to include/grant_cache.inc:
    - Minor improvements like replace --error <number> by --error <name>
    - enable that some subtests are run with "--ps-protocol"
mysql-test/include/query_cache_sql_prepare.inc:
  - Rename t/query_cache_sql_prepare.test to include/query_cache_sql_prepare.inc
  - Toplevel scripts running variants of this test are
       query_cache_ps_ps_prot.test (skipped if other protocol than --ps-protocol is used.)
       query_cache_ps_no_prot.test (skipped if --<whatever>-protocol is used)   
  - Modifications to include/query_cache_sql_prepare.inc:
  - Minor improvements like add drop table
  - Add tests checking that 
    - another connection gets the same amount of QC hits
    - statements running via ps-protocol do not hit QC results of preceding sql EXECUTEs
mysql-test/r/grant_cache_no_prot.result:
  Updated result
mysql-test/r/query_cache_ps_no_prot.result:
  Updated result
tests/mysql_client_test.c:
  - correct wrong sized "for" loop
  - add some missing tests of query cache hit numbers
mysql-test/r/grant_cache_ps_prot.result:
  New BitKeeper file ``mysql-test/r/grant_cache_ps_prot.result''
mysql-test/r/query_cache_ps_ps_prot.result:
  New BitKeeper file ``mysql-test/r/query_cache_ps_ps_prot.result''
mysql-test/t/grant_cache_no_prot.test:
  Variant of the test grant_cache to be run without any "--<whatever>-protocol"
mysql-test/t/grant_cache_ps_prot.test:
  Variant of the test grant_cache to be run with "--ps-protocol" only
mysql-test/t/query_cache_ps_no_prot.test:
  Variant of the test query_cache_sql_prepare to be run without any "--<whatever>-protocol"
mysql-test/t/query_cache_ps_ps_prot.test:
  Variant of the test query_cache_sql_prepare to be run with "--ps-protocol" only

mysql-test/t/grant_cache_ps_prot.test

@@ -0,0 +1,24 @@
+#################### t/grant_cache_ps_prot.test ##################
+#
+# Test grants with query cache to be run when mysqltest was
+# started with the option "--ps-protocol".
+#
+# Last update:
+# 2007-05-03 ML - Move t/grant_cache.test to include/grant_cache.inc
+#               - Create this test as "--ps-protocol" only variant.
+#
+
+# We cannot run on embedded server because we use multiple sessions.
+--source include/not_embedded.inc
+
+--source include/have_query_cache.inc
+
+# The file with expected results fits only to a run with "--ps-protocol".
+if (`SELECT $SP_PROTOCOL + $CURSOR_PROTOCOL + $VIEW_PROTOCOL > 0
+        OR $PS_PROTOCOL = 0`)
+{
+   --skip Test requires: ps-protocol enabled, other protocols disabled
+}
+
+# The main testing script
+--source include/grant_cache.inc