after 5.003_05:
	PERLLIB_PREFIX was not active if it matches an element of @INC
		as a whole.
	Do not need PERL_SBRK if crtdll-revision is >= 50.
	Use -Zsmall-conv if crtdll-revision is >= 50 (in static perl!).
:7: warning: #warning <dirent.h> requires <sys/types.h>
	We compile miniperl static. It cannot fork, thus there may be
		problems with pipes (since HAS_FORK is in
		place). Pipes are required by makemaker.
	We compile perl___.exe A.OUT and dynamic. It should be able to
		fork.
	If we can fork, we my_popen by popen unless "-|". Thus we
		write a cooky "-1" into the pid array to indicate
		this.
	Apparently we can fork, and we can load dynamic extensions
		now, though probably not simultaneously.
	*DB tests corrected for OS/2 one-user stat[2].
	/bin/sh is intercepted and replaced by SH_PATH.
	Note that having '\\' in the command line of one-arg `system'
		would trigger call via shell.
	Segfault with system {'ls'} 'blah'; corrected.
	Documentation of OS/2-different features added to main PODs.
	New buitins in Cwd::

		Cwd::current_drive
		Cwd::sys_chdir		- leaves drive as it is.
		Cwd::change_drive
		Cwd::sys_is_absolute	- has drive letter and is_rooted
		Cwd::sys_is_rooted	- has leading [/\\] (maybe
					  after a drive)
		Cwd::sys_is_relative	- changes with current dir
		Cwd::sys_cwd		- Interface to cwd from EMX.
		Cwd::sys_abspath(name, dir)	
					- Really really odious
					  function. Returns absolute
					  name of file which would 
					  have 'name' if CWD were 'dir'.
					Dir defaults to the current dir.
		Cwd::extLibpath [type]	- Get/set current value of extended
		Cwd::extLibpath_set	- library search path.
			path [type]
					The optional last argument redirects
					   to END-path if true,
					   default is to search BEGIN-path.
		(Note that some of these may be moved to different
		  libraries - eventually).
	Executables: 
		perl - can fork, can dynalink (but not simultaneously)
		perl_ - can fork, cannot dynalink
		perl__ - same as perl___, but PM.
		perl___ - cannot fork, can dynalink.
	The build of the first one - perl - is rather convoluted, and
	  requires a build of miniperl_.
after 5.003_05:
	PERLLIB_PREFIX was not active if it matches an element of @INC
		as a whole.
	Do not need PERL_SBRK if crtdll-revision is >= 50.
	Use -Zsmall-conv if crtdll-revision is >= 50 (in static perl!).
:7: warning: #warning <dirent.h> requires <sys/types.h>
	We compile miniperl static. It cannot fork, thus there may be
		problems with pipes (since HAS_FORK is in
		place). Pipes are required by makemaker.
	We compile perl___.exe A.OUT and dynamic. It should be able to
		fork.
	If we can fork, we my_popen by popen unless "-|". Thus we
		write a cooky "-1" into the pid array to indicate
		this.
	Apparently we can fork, and we can load dynamic extensions
		now, though probably not simultaneously.
	*DB tests corrected for OS/2 one-user stat[2].
	/bin/sh is intercepted and replaced by SH_PATH.
	Note that having '\\' in the command line of one-arg `system'
		would trigger call via shell.
	Segfault with system {'ls'} 'blah'; corrected.
	Documentation of OS/2-different features added to main PODs.
	New buitins in Cwd::

		Cwd::current_drive
		Cwd::sys_chdir		- leaves drive as it is.
		Cwd::change_drive
		Cwd::sys_is_absolute	- has drive letter and is_rooted
		Cwd::sys_is_rooted	- has leading [/\\] (maybe
					  after a drive)
		Cwd::sys_is_relative	- changes with current dir
		Cwd::sys_cwd		- Interface to cwd from EMX.
		Cwd::sys_abspath(name, dir)	
					- Really really odious
					  function. Returns absolute
					  name of file which would 
					  have 'name' if CWD were 'dir'.
					Dir defaults to the current dir.
		Cwd::extLibpath [type]	- Get/set current value of extended
		Cwd::extLibpath_set	- library search path.
			path [type]
					The optional last argument redirects
					   to END-path if true,
					   default is to search BEGIN-path.
		(Note that some of these may be moved to different
		  libraries - eventually).
	Executables: 
		perl - can fork, can dynalink (but not simultaneously)
		perl_ - can fork, cannot dynalink
		perl__ - same as perl___, but PM.
		perl___ - cannot fork, can dynalink.
	The build of the first one - perl - is rather convoluted, and
	  requires a build of miniperl_.

after 5.003_07:
	custom tmpfile and tmpname which may use $TMP, $TEMP.
	all the calls to OS/2 API wrapped so that it is safe to use
		them under DOS (may die(), though).
	Tested that popen works under DOS with modified PDKSH and RSX.
	File::Copy works under DOS.
	MakeMaker modified to work under DOS (perlmain.c.tmp and sh -c true).

after 5.003_08:
	OS2::PrfDB exports symbols as documented;
	should work on OS/2 2.1 again.
	uses reliable signals when spawing.
	do not use popen() any more - no intermediate shell unless needed.

after 5.003_11:
	Functions emx_{malloc,realloc,calloc,free} are exported from DLL.
	get_sysinfo() bugs corrected (flags were not used and wrongly defined).

after 5.003_20:
	_isterm is substituted instead of isatty, s?random instead of srand.
	`register' disabled if -DDEBUGGING and not AOUT build: stupid SD386.
	3-argument select() was stomping over memory.

after 5.003_21:
	Can start scripts by executing 'dir/script' and
	'script.sh'. Form without extension will call shell only if
	the specified file exists (will not look on path) (to prohibit
	trying to run shell commands directly). - Needed by magic.t.

after 5.003_27:
	ALTERNATE_SHEBANG="extproc " supported, thus options on this
	line are processed (possibly twice). -S is made legal on such
	a line. This -S -x is not needed any more.
	perl.dll may be used from non-EMX programs (via PERL_SYS_INIT
	- the caller should have valid variable "env" with
	environment). Known problems: $$ does not work - is 0, waitpid
	returns immediately, thus Perl cannot wait for completion of
	started programs.

after 5.004_01:
	flock emulation added (disable by setting env PERL_USE_FLOCK=0),
		thanks to Rocco Caputo;
	RSX bug with missing waitpid circomvented;
	-S bug with full path with \ corrected.

before 5.004_02:
	-S switch to perl enables a search with additional extensions 
	.cmd, .btm, .bat, .pl as well.  This means that if you have
	mycmd.pl or mycmd.bat on PATH, 
		perl -S mycmd
	will work.  Perl will also look in the current directory first.
	Moreover, a bug with \; in PATH being non-separator is fixed.

after 5.004_03:
	$^E tracks calls to CRT now.  (May break if Perl masks some
	changes to errno?)
	$0 may be edited to longer lengths (at least under OS/2).
	OS2::REXX->loads looks in the OS/2-ish fashion too.

after 5.004_04:
	Default perl.exe was built with a shorter stack than expected.
	Strip extensions DLLs too (unless debugging build).
	./os2.c being RO could stop cp.
	When starting scripts, Perl will find them on path (using the same
	  extensions as for -S command-line switch).  If it finds magic
	  `extproc ' or `#!' cookies, it will start the scripts directly.
	May use `cmd /c more <' as a pager.
	If a program could not be started, this might have been hidden.
	End of pipe was closed twice when `open'ing a pipeline.

after 5.004_53:
	Minimal thread support added.  One needs to manually move pthread.h

after 5.004_64:
	Make DLL names different if thread-enabled.
	Emit more informative internal DLL descriptions.
