Added new test cases, fixed bugs in relation to those

into  mikael-ronstr-ms-dator.local:/Users/mikron/mysql_clones/bug18198

into  dator3.(none):/home/mikael/mysql_clones/bug18198

Apparently it's the only platform in pushbuild where we 
compile without openssl.

into  mikael-ronstr-ms-dator.local:/Users/mikron/mysql_clones/bug18198

into  mikael-ronstr-ms-dator.local:/Users/mikron/mysql_clones/bug18198

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.1-runtime

into  bodhi.local:/opt/local/work/mysql-5.0-runtime

into  naruto.:C:/cpp/mysql-5.1-runtime

- Some variables in I_S.GLOBAL_STATUS were depending on a network
  connection in order to evaluate. Since no network connection is 
  present during the execution of an event, this caused the server
  to crash.
- The variable function hooks does now verify that the vio-
  object is valid before attempting to use it.

into  bk-internal.mysql.com:/data0/bk/mysql-5.0-opt

into  bk-internal.mysql.com:/data0/bk/mysql-5.1-opt

into  olga.mysql.com:/home/igor/mysql-5.1-opt

into  mysql.com:/nfsdisk1/lars/MERGE/mysql-5.1-merge

into  mysql.com:/nfsdisk1/lars/MERGE/mysql-5.0-merge

into  mysql.com:/nfsdisk1/lars/MERGE/mysql-5.0-merge

into  mysql.com:/nfsdisk1/lars/bk/mysql-5.1-new-rpl

new test case until the valgrind failure is fixed, 
reported in bug 27564)

into  mysql.com:/nfsdisk1/lars/MERGE/mysql-5.1-merge

into  mysql.com:/nfsdisk1/lars/MERGE/mysql-5.1-merge

into  mysql.com:/nfsdisk1/lars/MERGE/mysql-5.0-merge

into  bk-internal.mysql.com:/data0/bk/mysql-4.1-opt

conditions.
When allocating memory for KEY_FIELD/SARGABLE_PARAM structures the
function update_ref_and_keys did not take into account the fact that
a single row equality could be replaced by several simple equalities.
Fixed by adjusting the counter cond_count accordingly for each subquery
when performing substitution of a row equality for simple equalities. 
 

into  bk-internal.mysql.com:/data0/bk/mysql-5.0-opt

into  mysql.com:/home/psergey/mysql-5.1-merge2

  After merge fix.

into  moonbone.local:/mnt/gentoo64/work/bk-trees/mysql-5.1-opt

into  mysql.com:/nfsdisk1/lars/MERGE/mysql-5.1-merge

into  mysql.com:/nfsdisk1/lars/MERGE/mysql-5.1-merge