Applying InnoDB Plugin 1.0.6 snapshot,part 1. Fixes BUG#45992 and BUG#46656

Detailed revision comments:

r6130 | marko | 2009-11-02 11:42:56 +0200 (Mon, 02 Nov 2009) | 9 lines
branches/zip: Free all resources at shutdown. Set pointers to NULL, so
that Valgrind will not complain about freed data structures that are
reachable via pointers.  This addresses Bug #45992 and Bug #46656.

This patch is mostly based on changes copied from branches/embedded-1.0,
mainly c5432, c3439, c3134, c2994, c2978, but also some other code was
copied.  Some added cleanup code is specific to MySQL/InnoDB.

rb://199 approved by Sunny Bains

storage/innodb_plugin/include/fil0fil.h

@@ -224,15 +224,6 @@ fil_space_create(
 				0 for uncompressed tablespaces */
 	ulint		purpose);/*!< in: FIL_TABLESPACE, or FIL_LOG if log */
 /*******************************************************************//**
-Frees a space object from a the tablespace memory cache. Closes the files in
-the chain but does not delete them.
-@return	TRUE if success */
-UNIV_INTERN
-ibool
-fil_space_free(
-/*===========*/
-	ulint	id);	/*!< in: space id */
-/*******************************************************************//**
 Returns the size of the space in pages. The tablespace must be cached in the
 memory cache.
 @return	space size, 0 if space not found */
@@ -278,6 +269,12 @@ fil_init(
 	ulint	hash_size,	/*!< in: hash table size */
 	ulint	max_n_open);	/*!< in: max number of open files */
 /*******************************************************************//**
+Initializes the tablespace memory cache. */
+UNIV_INTERN
+void
+fil_close(void);
+/*===========*/
+/*******************************************************************//**
 Opens all log files and system tablespace data files. They stay open until the
 database server shutdown. This should be called at a server startup after the
 space objects for the log and the system tablespace have been created. The