[TCLCORE] Tcl bugfixes to backport for 8.3.2

[Eric M. <er...@aj...>]

Here's my list of fixes to backport for 8.3.2.  Unlike the Tk fixes, most
of these are not as interesting (doc fixes, etc).  There's a couple of
good ones in there, though (build cleanup, clock bugs, http bugs).

- eric

	* doc/memory.n: Man page for Tcl "memory" command, which is
	created when TCL_MEM_DEBUG is defined at compile time.

	* doc/TCL_MEM_DEBUG.3: Man page with overall information about
	TCL_MEM_DEBUG usage.

	* doc/DumpActiveMemory.3: Man page for Tcl_DumpActiveMemory,
	Tcl_InitMemory, and Tcl_ValidateAllMemory [Bug: 1816, 1835].

	* generic/tclCkalloc.c: Fixed some function headers.

	* unix/mkLinks: Regen'd with new mkLinks.tcl.

	* unix/mkLinks.tcl: Fixed indentation, made link setup more
	intelligent (only do one existance test per man page, instead of
	one per function).

	* doc/library.n: Fixed .SH NAME macro to include each function
	documented on the page, so that mkLinks will know about the
	functions listed there, and so that the Windows help file index
	will get set up correctly [Bug: 1898, 5273].

	* doc/library.n: Added entries for auto_qualify and auto_import
	[Bug: 1271].

	* doc/Init.3: Manual entry for Tcl_Init [Bug: 1820].

	* doc/expr.n: Added documentation for each of the math library
	functions that expr supports [Bug: 1054].

	* unix/Makefile.in: add tclsh.ico and tcl.spec to dist target

	* generic/tclPosixStr.c (Tcl_SignalMsg): clarified #defines for
	Linux on Sparc to compile correctly. [Bug: 5364]

	* library/history.tcl: Corrected an off-by-one error in HistIndex,
	which was causing [history redo] to start its search at the wrong
	event index. [Bug: 1269].

	* library/init.tcl (auto_import): added check to see if a valid
	pattern was coming in, to avoid simple error cases [Bug: 3326]

	* doc/regsub.n: correct regsub docs [Bug: 5346]

	* win/{tcl.m4,Makefile.in,configure.in}: added support for mingw
	compile env and cross-compiling. [Bug: 5499]

	* generic/tclClock.c (FormatClock): correct code to handle locale
	specific return values from strftime, if any. [Bug: 3345]

	* unix/tclUnixInit.c (TclpSetInitialEncodings): attempt to
	correct setlocale calls for XIM support and locale issues.
	[BUG: 5422 3345 4236 2522 2521]

	* tests/clock.test: Added test for "2 days 2 hours ago" style
	specifications.

	* generic/tclDate.c: Regenerated from tclGetDate.y.

	* generic/tclGetDate.y: Tweaked grammar to properly handle the
	"ago" keyword when it follows multiple relative unit specifiers,
	as in "2 days 2 hours ago".  [Bug: 5497].

	* doc/scan.n: 
	* doc/array.n: minor doc fixes [Bug: 5396]

	* generic/tclEnv.c: cast cleanup [Bug: 5624]
	* win/tclWinConsole.c: cast and header cleanup [Bug: 5625]
	* win/tclWinSerial.c: cast cleanup [Bug: 5626]
	* win/tclWinFCmd.c: cast cleanup [Bug: 5627]

	* tests/http.test
	* doc/http.n
	* library/http2.3/http.tcl: Fixed bug 5741, where unsuccessful
	geturl calls sometimes leaked memory and resources (sockets).  
	Also, switched around some of the logic so that http::wait never 
	throws an exception.  This is because in an asynchronous geturl, 
	the command callback will probably end up doing all the error 
	handling anyway, and in an asynchronous situation, the user
	expects to check the state when the transaction completes, as
	opposed to being thrown an exception.	For the http package, this
	menas the user can check http::status for "error" and http::error
	for the error message after doing the http::wait.

	* generic/tclIndexObj.c (Tcl_GetIndexFromObjStruct): Corrected
	caching of the index ptr to account for offsets != sizeof(char *).
	[Bug: 5153]

	* win/tcl.m4:
	* win/configure.in:
	* win/Makefile.in: Applied patch from [RFE: 5844], to extend
	support for mingw compile environment on Windows.

	* win/tclWinDde.c:
	* win/tclWinInit.c:
	* win/tclWinNotify.c:
	* win/tclWinPipe.c:
	* win/tclWinReg.c:
	* win/tclWinThrd.c: Applied patch from [Bug: 5794], to fix
	compiler warnings when using mingw on Windows.

	* doc/RegExp.3: Replaced instances of "Tcl_GetRegExpInfo" with
	"Tcl_RegExpGetInfo", the correct name of the function [Bug: 5901].

	* library/opt0.4/optparse.tcl: Applied patch from [Bug: 5922],
	which corrected an incorrect use of [string match].

	* unix/tclConfig.sh.in:
	* win/tclConfig.sh.in: Applied patch from [Bug: 5921], which
	corrects a typo in the comments in these files.

	* doc/package.n: Corrected information about [package forget]
	arguments [Bug: 5418].

	* tests/stringObj.test: Tweaked tests to avoid hardcoded
	high-ASCII characters (which will fail in multibyte locales);
	instead used \uXXXX syntax. [Bug: 3842].




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