Don't do signal() on windows (Causes instability problems)

Safer, a bit faster filesort.
Code changes to avoid calls to current_thd() (faster code).
Removed all compiler warnings from readline.


BitKeeper/etc/ignore:
  Add my_global.h back.
Docs/manual.texi:
  4.0.1 Changelog
include/my_sys.h:
  Added strmake_root
libmysql/libmysql.c:
  Don't do signal() on windows (Causes instability problems)
mysys/my_alloc.c:
  Added strmake_root
readline/bind.c:
  Remove warnings
readline/complete.c:
  Remove warnings
readline/display.c:
  Remove warnings
readline/funmap.c:
  Remove warnings
readline/histexpand.c:
  Remove warnings
readline/histfile.c:
  Remove warnings
readline/history.h:
  Remove warnings
readline/histsearch.c:
  Remove warnings
readline/isearch.c:
  Remove warnings
readline/kill.c:
  Remove warnings
readline/macro.c:
  Remove warnings
readline/readline.c:
  Remove warnings
readline/readline.h:
  Remove warnings
readline/rltty.c:
  Remove warnings
readline/search.c:
  Remove warnings
readline/shell.c:
  Remove warnings
readline/terminal.c:
  Remove warnings
readline/tilde.c:
  Remove warnings
readline/tilde.h:
  Remove warnings
readline/undo.c:
  Remove warnings
readline/util.c:
  Remove warnings
readline/vi_mode.c:
  Remove warnings
sql-bench/server-cfg.sh:
  Added use of truncate table
sql-bench/test-insert.sh:
  Added use of truncate table
  Changed some tests to use keys instead of 'range'
sql-bench/test-wisconsin.sh:
  Cleanup
sql/field.cc:
  Add 'thd' to send() (To avoid usage of 'current_thd')
sql/field.h:
  Add 'thd' to send() (To avoid usage of 'current_thd')
sql/filesort.cc:
  Safer memory allocation;  Don't allocate pointer to buffers directly, but use an IO_CACHE instead.
  This will allow us to use more memory for keys and will also work better if the number of rows that is to be sorted is much larger than expected.
sql/item.cc:
  Add 'thd' to send() (To avoid usage of 'current_thd')
sql/item.h:
  Add 'thd' to send() (To avoid usage of 'current_thd')
sql/item_func.h:
  Cleanup
sql/opt_range.cc:
  Use mem_root instead of sql_alloc() to get more speed
sql/sql_class.cc:
  Add 'thd' to send() (To avoid usage of 'current_thd')
sql/sql_class.h:
  Added strmake()
sql/sql_handler.cc:
  Add 'thd' to send() (To avoid usage of 'current_thd')
sql/sql_lex.cc:
  Use mem_root instead of sql_alloc() to get more speed
sql/sql_select.cc:
  Add 'thd' to send() (To avoid usage of 'current_thd')
tests/fork2_test.pl:
  Fixed typos
tests/fork_big.pl:
  Fixed typos
tests/insert_and_repair.pl:
  Fixed typos
tests/rename_test.pl:
  Fixed typos
tests/test_delayed_insert.pl:
  Fixed typos

readline/tilde.c

@@ -82,13 +82,13 @@ extern char *get_env_value ();
 /* The default value of tilde_additional_prefixes.  This is set to
    whitespace preceding a tilde so that simple programs which do not
    perform any word separation get desired behaviour. */
-static char *default_prefixes[] =
+static const char *default_prefixes[] =
   { " ~", "\t~", (char *)NULL };
 
 /* The default value of tilde_additional_suffixes.  This is set to
    whitespace or newline so that simple programs which do not
    perform any word separation get desired behaviour. */
-static char *default_suffixes[] =
+static const char *default_suffixes[] =
   { " ", "\n", (char *)NULL };
 
 /* If non-null, this contains the address of a function that the application
@@ -106,12 +106,12 @@ CPFunction *tilde_expansion_failure_hook = (CPFunction *)NULL;
 /* When non-null, this is a NULL terminated array of strings which
    are duplicates for a tilde prefix.  Bash uses this to expand
    `=~' and `:~'. */
-char **tilde_additional_prefixes = default_prefixes;
+const char ** tilde_additional_prefixes = default_prefixes;
 
 /* When non-null, this is a NULL terminated array of strings which match
    the end of a username, instead of just "/".  Bash sets this to
    `:' and `=~'. */
-char **tilde_additional_suffixes = default_suffixes;
+const char **tilde_additional_suffixes = default_suffixes;
 
 /* Find the start of a tilde expansion in STRING, and return the index of
    the tilde which starts the expansion.  Place the length of the text
@@ -122,7 +122,7 @@ tilde_find_prefix (string, len)
      int *len;
 {
   register int i, j, string_len;
-  register char **prefixes = tilde_additional_prefixes;
+  register const char **prefixes = tilde_additional_prefixes;
 
   string_len = strlen (string);
   *len = 0;
@@ -154,7 +154,7 @@ tilde_find_suffix (string)
      char *string;
 {
   register int i, j, string_len;
-  register char **suffixes;
+  register const char **suffixes;
 
   suffixes = tilde_additional_suffixes;
   string_len = strlen (string);