Backport Bug #43913  rpl_cross_version can't pass on conflicts complainig clash with --slave-load-tm

The 'rpl_cross_version' fails on mysql-next-mr-bugfixing as following:
mysqltest: In included file "./include/setup_fake_relay_log.inc": At line 80: query
'select './$_fake_filename-fake.000001\n' into dumpfile '$_fake_relay_index'' failed:
1290: The MySQL server is running with the --secure-file-priv option so it cannot execute
this statement.

To fix the problem by removeing the --secure-file-priv option
for adapting the update of the 'setup_fake_relay_log.inc'.

Conflicts:
  - storage/myisam/mi_static.c

as the bug#46931 and bug#43913 have been closed.

into mysql-trunk-bugfixing.

Original revision:
------------------------------------------------------------
revision-id: vvaintroub@mysql.com-20091222115311-bam0xorumd8gvjyo
parent: mattias.jonsson@sun.com-20091221104426-x2e6c93x8iik4fo0
committer: Vladislav Vaintroub <vvaintroub@mysql.com>
branch nick: mysql-next-mr-bugfixing
timestamp: Tue 2009-12-22 12:53:11 +0100
message:
  Bug#49834 - fixed a bug introduced by mismerge.
  restore original innobase version
------------------------------------------------------------

by shared embedded library)

    the value obtained by String::c_ptr() method not always
    has the ending zero. Particularly in this bug the
    dlsym() expects zero-ending string.
    The String::c_ptr_safe() is more correct here.

per-file comments:
  sql/item_func.cc
Bug#46570      test udf fails with valgrind
    c_ptr_safe() used for UDF parameters as the library expects
    zero-ending strings.

restore original innobase version

Conflicts:
  - storage/ibmdb2i/ha_ibmdb2i.cc

Conflicts:
  - storage/ibmdb2i/ha_ibmdb2i.cc

Force use of c-register in CAS instruction on x86-32 bit architecture, b-register used for push and pop, so don't want to give compile the chance to choose the wrong register

Recommit of patch:
http://lists.mysql.com/commits/91400

Test case only (code part was pushes as bug-49028)

It was pthread_mutex_t in mi_static.c and 
mysql_mutex_t in my_thr_init.c

Solaris linker complains about different size of the 
symbol.

Fix : use mysql_mutex_t everywhere.