WL#5030: Split and remove mysql_priv.h

This patch:

- Moves all definitions from the mysql_priv.h file into
  header files for the component where the variable is
  defined
- Creates header files if the component lacks one
- Eliminates all include directives from mysql_priv.h
- Eliminates all circular include cycles
- Rename time.cc to sql_time.cc
- Rename mysql_priv.h to sql_priv.h

include/password.h

@@ -0,0 +1,32 @@
+/* Copyright 2006-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */
+
+#ifndef PASSWORD_INCLUDED
+#define PASSWORD_INCLUDED
+
+#include "my_global.h"
+
+C_MODE_START
+
+void my_make_scrambled_password_323(char *to, const char *password,
+                                    size_t pass_len);
+void my_make_scrambled_password(char *to, const char *password,
+                                size_t pass_len);
+
+void hash_password(ulong *result, const char *password, uint password_len);
+
+C_MODE_END
+
+#endif /* PASSWORD_INCLUDED */