Revision 1619068

Remove the "checked" option from svn_mutex_t.  Update all callers
and remove the regression test.

The reason is that there seems to be no portable way (e.g. via a
series of conversions) to use APR atomic CAS operations with
apr_os_thread_t.

* subversion/include/private/svn_mutex.h
  (svn_mutex__init): Remove CHECKED option.

* subversion/include/svn_error_codes.h
  (SVN_ERR_RECURSIVE_LOCK): Remove as it has no users anymore.
  (SVN_ERR_INVALID_INPUT): Update number.

* subversion/libsvn_subr/mutex.c
  (svn_mutex__t): Remove all aux. members that were used for mutex
                  checking only.  Make sure we don't end up with an
                  empty struct on systems that don't support threads.
  (svn_mutex__init,
   svn_mutex__lock, 
   svn_mutex__unlock): Remove all mutex the checking code.

* subversion/tests/libsvn_fs_fs/fs-fs-pack-test.c
  (never_reached,
   lock_again,
   recursive_locking): Remove test case for "checked" mutexes.
  (test_funcs): Remove test from list.

* subversion/libsvn_fs_base/bdb/env.c
  (bdb_init_cb): Update mutex init call.

* subversion/libsvn_fs_fs/fs.c
  (fs_serialized_init): Same.

* subversion/libsvn_fs/fs-loader.c
  (synchronized_initialize): Same.

* subversion/libsvn_fs_x/fs.c
  (x_serialized_init): Same.

* subversion/libsvn_ra_svn/cyrus_auth.c
  (sasl_mutex_alloc_cb_internal,
   svn_ra_svn__sasl_common_init): Same.

* subversion/libsvn_subr/cache-inprocess.c
  (svn_cache__create_inprocess): Same.

* subversion/libsvn_subr/cache-membuffer.c
  (svn_cache__membuffer_cache_create,
   svn_cache__create_membuffer_cache): Same. 

* subversion/libsvn_subr/dso.c
  (svn_dso_initialize2): Same.

* subversion/libsvn_subr/named_atomic.c
  (init_thread_mutex): Same.

* subversion/libsvn_subr/object_pool.c
  (svn_object_pool__create): Same.

* subversion/libsvn_subr/root_pools.c
  (svn_root_pools__create): Same.

* subversion/libsvn_subr/utf.c
  (svn_utf_initialize2): Same.

* subversion/svnserve/logger.c
  (logger__create_for_stderr, 
   logger__create): Same.

* subversion/tests/svn_test_main.c
  (svn_test_main): Same.