[inseperable changes from patch from perl-5.003_95 to perl-5.003_86]

[editor's note: this commit was prepared manually so may differ in
minor ways to other inseperable changes commits]

 CORE LANGUAGE CHANGES

  Title:  "Support $ENV{PERL5OPT}"
   From:  Chip Salzenberg
  Files:  perl.c pod/perldiag.pod pod/perldelta.pod pod/perlrun.pod

  Title:  "Implement void context, in which C<wantarray> is undef"
   From:  Chip Salzenberg
  Files:  cop.h doop.c dump.c global.sym gv.c op.c op.h perl.c
          pod/perlcall.pod pod/perldelta.pod pod/perlfunc.pod
          pod/perlguts.pod pod/perlsub.pod pp.c pp_ctl.c pp_hot.c
          pp_sys.c proto.h

  Title:  "Don't look up &AUTOLOAD in @ISA when calling plain function"
   From:  Chip Salzenberg
  Files:  global.sym gv.c lib/Text/ParseWords.pm pod/perldelta.pod
          pp_hot.c proto.h t/op/method.t

  Title:  "Allow closures to be constant subroutines"
   From:  Chip Salzenberg
  Files:  op.c

  Title:  "Make C<scalar(reverse)> mean C<scalar(reverse $_)>"
   From:  Chip Salzenberg
  Files:  pp.c

  Title:  "Fix lexical suicide from C<my $x = $x> in sub"
   From:  Chip Salzenberg
  Files:  op.c

  Title:  "Make "Unrecog. char." fatal, and update its doc"
   From:  Chip Salzenberg
  Files:  pod/perldiag.pod toke.c

 CORE PORTABILITY

  Title:  "safefree() mismatch"
   From:  Roderick Schertler
 Msg-ID:  <21338.859653381@eeyore.ibcinc.com>
   Date:  Sat, 29 Mar 1997 11:36:21 -0500
  Files:  util.c

    (applied based on p5p patch as commit id 9b9b466fb02dc96c81439bafbb3b2da55238cfd2)

  Title:  "Win32 update (seven patches)"
   From:  Gurusamy Sarathy and Nick Ing-Simmons
  Files:  EXTERN.h MANIFEST win32/Makefile win32/perl.mak
          win32/perl.rc win32/perldll.mak win32/makedef.pl
          win32/modules.mak win32/win32io.c win32/bin/pl2bat.bat

 OTHER CORE CHANGES

  Title:  "Report PERL* environment variables in -V and perlbug"
   From:  Chip Salzenberg
  Files:  perl.c utils/perlbug.PL

  Title:  "Typo in perl.c: Printing NO_EMBED for perl -V"
   From:  Gisle Aas
 Msg-ID:  <199703301922.VAA13509@furubotn.sn.no>
   Date:  Sun, 30 Mar 1997 21:22:11 +0200
  Files:  perl.c

    (applied based on p5p patch as commit id b6c639e4b1912ad03b9b10ba9518d96bd0a6cfaf)

  Title:  "Don't let C<$var = $var> untaint $var"
   From:  Chip Salzenberg
  Files:  pp_hot.c pp_sys.c sv.h t/op/taint.t

  Title:  "Fix autoviv bug in C<my $x; ++$x->{KEY}>"
   From:  Chip Salzenberg
  Files:  pp_hot.c

  Title:  "Re: 5.004's new srand() default seed"
   From:  Hallvard B Furuseth
 Msg-ID:  <199703302219.AAA20998@bombur2.uio.no>
   Date:  Mon, 31 Mar 1997 00:19:13 +0200 (MET DST)
  Files:  pp.c

    (applied based on p5p patch as commit id d7d933a26349f945f93b2f0dbf85b773d8ca3219)

  Title:  "Re: embedded perl and top_env problem "
   From:  Gurusamy Sarathy
 Msg-ID:  <199703280031.TAA05711@aatma.engin.umich.edu>
   Date:  Thu, 27 Mar 1997 19:31:42 -0500
  Files:  gv.c interp.sym perl.c perl.h pp_ctl.c pp_sys.c scope.h util.c

    (applied based on p5p patch as commit id f289f7d2518e7a8a82114282e774adf50fa6ce85)

  Title:  "Define and use new macro: boolSV()"
   From:  Tim Bunce
  Files:  gv.c lib/ExtUtils/typemap os2/os2.c pp.c pp_hot.c pp_sys.c
          sv.c sv.h universal.c vms/vms.c

  Title:  "Re: strict @F"
   From:  Hallvard B Furuseth
 Msg-ID:  <199703252110.WAA16038@bombur2.uio.no>
   Date:  Tue, 25 Mar 1997 22:10:33 +0100 (MET)
  Files:  toke.c

    (applied based on p5p patch as commit id dfd44a5c8c8dd4c001c595debfe73d011a96d844)

  Title:  "Try harder to identify errors at EOF"
   From:  Chip Salzenberg
  Files:  toke.c

  Title:  "Minor string change in toke.c: 'bareword'"
   From:  lvirden@cas.org
 Msg-ID:  <1997Mar27.130247.1911552@hmivax.humgen.upenn.edu>
   Date:  Thu, 27 Mar 1997 13:02:46 -0500 (EST)
  Files:  toke.c

    (applied based on p5p patch as commit id 9b56c8f8085a9e773ad87c6b3c1d0b5e39dbc348)

  Title:  "Improve diagnostic on \r in program text"
   From:  Chip Salzenberg
  Files:  pod/perldiag.pod toke.c

  Title:  "Make Sock_size_t typedef work right"
   From:  Chip Salzenberg
  Files:  perl.h pp_sys.c

 LIBRARY AND EXTENSIONS

  Title:  "New module constant.pm"
   From:  Tom Phoenix
  Files:  MANIFEST lib/constant.pm op.c pp.c t/pragma/constant.t

  Title:  "Remove chat2"
   From:  Chip Salzenberg
  Files:  MANIFEST lib/chat2.inter lib/chat2.pl

  Title:  "Include CGI.pm 2.32"
   From:  Chip Salzenberg
  Files:  MANIFEST eg/cgi/* lib/CGI.pm lib/CGI/Apache.pm
          lib/CGI/Carp.pm lib/CGI/Fast.pm lib/CGI/Push.pm
          lib/CGI/Switch.pm

 UTILITIES

  Title:  "Tom C's Pod::Html and html tools, as of 30 March 97"
   From:  Chip Salzenberg
  Files:  MANIFEST installhtml lib/Pod/Html.pm pod/pod2html.PL

  Title:  "Fix path bugs in installhtml"
   From:  Robin Barker <rmb1@cise.npl.co.uk>
 Msg-ID:  <3180.9703270906@tempest.cise.npl.co.uk>
   Date:  Thu, 27 Mar 97 09:06:14 GMT
  Files:  installhtml

  Title:  "Make perlbug say that it's only for core Perl bugs"
   From:  Chip Salzenberg
  Files:  utils/perlbug.PL

 DOCUMENTATION

  Title:  "Document autouse and constant; update diagnostics"
   From:  Chip Salzenberg
  Files:  pod/perldelta.pod

  Title:  "Suggest to upgraders that they try '-w' again"
   From:  Hallvard B Furuseth
 Msg-ID:  <199703251901.UAA15982@bombur2.uio.no>
   Date:  Tue, 25 Mar 1997 20:01:26 +0100 (MET)
  Files:  pod/perldelta.pod

    (applied based on p5p patch as commit id 4176c059b9ba6b022e99c44270434a5c3e415b73)

  Title:  "Improve and update documentation of constant subs"
   From:  Tom Phoenix <rootbeer@teleport.com>
 Msg-ID:  <Pine.GSO.3.96.970331122546.14185C-100000@kelly.teleport.com>
   Date:  Mon, 31 Mar 1997 13:05:54 -0800 (PST)
  Files:  pod/perlsub.pod

  Title:  "Improve documentation of C<return>"
   From:  Chip Salzenberg
  Files:  pod/perlfunc.pod pod/perlsub.pod

  Title:  "perlfunc.pod patch"
   From:  Gisle Aas
 Msg-ID:  <199703262159.WAA17531@furubotn.sn.no>
   Date:  Wed, 26 Mar 1997 22:59:23 +0100
  Files:  pod/perlfunc.pod

    (applied based on p5p patch as commit id 35a731fcbcd7860eb497d6598f3f77b8746319c4)

  Title:  "Use 'while (defined($x = <>)) {}', per <gnat@frii.com>"
   From:  Chip Salzenberg
  Files:  configpm lib/Term/Cap.pm perlsh pod/perlipc.pod pod/perlop.pod
          pod/perlsub.pod pod/perlsyn.pod pod/perltrap.pod
          pod/perlvar.pod win32/bin/search.bat

  Title:  "Document and test C<%> behavior with negative operands"
   From:  Chip Salzenberg
  Files:  pod/perlop.pod t/op/arith.t

  Title:  "Update docs on $]"
   From:  Chip Salzenberg
  Files:  pod/perlvar.pod

  Title:  "perlvar.pod patch"
   From:  Gisle Aas
 Msg-ID:  <199703261254.NAA10237@bergen.sn.no>
   Date:  Wed, 26 Mar 1997 13:54:00 +0100
  Files:  pod/perlvar.pod

    (applied based on p5p patch as commit id 0aa182cb0caa3829032904b9754807b1b7418509)

  Title:  "Fix example of C<or> vs. C<||>"
   From:  Chip Salzenberg
  Files:  pod/perlsyn.pod

  Title:  "Pod usage and spelling patch"
   From:  Larry W. Virden
  Files:  pod/*.pod

  Title:  "Pod updates"
   From:  "Cary D. Renzema" <caryr@mxim.com>
 Msg-ID:  <199703262353.PAA01819@macs.mxim.com>
   Date:  Wed, 26 Mar 1997 15:53:22 -0800 (PST)
  Files:  pod/*.pod

    (applied based on p5p patch as commit id 5695b28edc67a3f45e8a0f25755d07afef3660ac)

1 files changed, 34 insertions, 42 deletions

diff --git a/pod/perlvar.pod b/pod/perlvar.pod
index 1406858331..b569465d15 100644
--- a/pod/perlvar.pod
+++ b/pod/perlvar.pod
@@ -52,7 +52,7 @@ The default input and pattern-searching space.  The following pairs are
 equivalent:
 
     while (<>) {...}	# equivalent in only while!
-    while ($_ = <>) {...}
+    while (defined($_ = <>)) {...}
 
     /^Subject:/
     $_ =~ /^Subject:/
@@ -63,7 +63,7 @@ equivalent:
     chop
     chop($_)
 
-Here are the places where Perl will assume $_ even if you 
+Here are the places where Perl will assume $_ even if you
 don't use it:
 
 =over 3
@@ -83,16 +83,16 @@ Various list functions like print() and unlink().
 The pattern matching operations C<m//>, C<s///>, and C<tr///> when used
 without an C<=~> operator.
 
-=item * 
+=item *
 
 The default iterator variable in a C<foreach> loop if no other
 variable is supplied.
 
-=item * 
+=item *
 
 The implicit iterator variable in the grep() and map() functions.
 
-=item * 
+=item *
 
 The default place to put an input record when a C<E<lt>FHE<gt>>
 operation's result is tested by itself as the sole criterion of a C<while>
@@ -108,7 +108,7 @@ test.  Note that outside of a C<while> test, this will not happen.
 
 =item $E<lt>I<digit>E<gt>
 
-Contains the sub-pattern from the corresponding set of parentheses in
+Contains the subpattern from the corresponding set of parentheses in
 the last pattern matched, not counting patterns matched in nested
 blocks that have been exited already.  (Mnemonic: like \digit.)
 These variables are all read-only.
@@ -162,7 +162,7 @@ This variable is read-only.
 
 =item $*
 
-Set to 1 to do multi-line matching within a string, 0 to tell Perl
+Set to 1 to do multiline matching within a string, 0 to tell Perl
 that it can assume that strings contain a single line, for the purpose
 of optimizing pattern matches.  Pattern matches on strings containing
 multiple newlines can produce confusing results when "C<$*>" is 0.  Default
@@ -199,15 +199,15 @@ number.)
 
 The input record separator, newline by default.  Works like B<awk>'s RS
 variable, including treating empty lines as delimiters if set to the
-null string.  (Note:  An empty line cannot contain any spaces or
-tabs.) You may set it to a multicharacter string to match a
-multi-character delimiter.  Note that setting it to C<"\n\n"> means
-something slightly different than setting it to C<"">, if the file
-contains consecutive empty lines.  Setting it to C<""> will treat two
-or more consecutive empty lines as a single empty line.  Setting it to
-C<"\n\n"> will blindly assume that the next input character belongs to
-the next paragraph, even if it's a newline.  (Mnemonic: / is used to
-delimit line boundaries when quoting poetry.)
+null string.  (Note: An empty line cannot contain any spaces or tabs.)
+You may set it to a multicharacter string to match a multicharacter
+delimiter, or to C<undef> to read to end of file.  Note that setting it
+to C<"\n\n"> means something slightly different than setting it to
+C<"">, if the file contains consecutive empty lines.  Setting it to
+C<""> will treat two or more consecutive empty lines as a single empty
+line.  Setting it to C<"\n\n"> will blindly assume that the next input
+character belongs to the next paragraph, even if it's a newline.
+(Mnemonic: / is used to delimit line boundaries when quoting poetry.)
 
     undef $/;
     $_ = <FH>; 		# whole file now here
@@ -222,10 +222,10 @@ better for something :-)
 
 =item $|
 
-If set to nonzero, forces a flush after every write or print on the
+If set to nonzero, forces a flush right away and after every write or print on the
 currently selected output channel.  Default is 0 (regardless of whether
 the channel is actually buffered by the system or not; C<$|> tells you
-only whether you've asked Perl explicitly to flush after each write). 
+only whether you've asked Perl explicitly to flush after each write).
 Note that STDOUT will typically be line buffered if output is to the
 terminal and block buffered otherwise.  Setting this variable is useful
 primarily when you are outputting to a pipe, such as when you are running
@@ -279,7 +279,7 @@ is a space.  (Mnemonic: obvious, I think.)
 
 =item $;
 
-The subscript separator for multi-dimensional array emulation.  If you
+The subscript separator for multidimensional array emulation.  If you
 refer to a hash element as
 
     $foo{$a,$b,$c}
@@ -302,7 +302,7 @@ keys contain binary data there might not be any safe value for "C<$;>".
 semi-semicolon.  Yeah, I know, it's pretty lame, but "C<$,>" is already
 taken for something more important.)
 
-Consider using "real" multi-dimensional arrays.
+Consider using "real" multidimensional arrays.
 
 =item $OFMT
 
@@ -372,7 +372,7 @@ appended.  (Mnemonic: points to top of page.)
 =item $:
 
 The current set of characters after which a string may be broken to
-fill continuation fields (starting with ^) in a format.  Default is 
+fill continuation fields (starting with ^) in a format.  Default is
 S<" \n-">, to break on whitespace or hyphens.  (Mnemonic: a "colon" in
 poetry is a part of a line.)
 
@@ -399,7 +399,7 @@ L<perlfunc/formline()>.
 
 =item $?
 
-The status returned by the last pipe close, back-tick (C<``>) command,
+The status returned by the last pipe close, backtick (C<``>) command,
 or system() operator.  Note that this is the status word returned by
 the wait() system call (or else is made up to look like it).  Thus,
 the exit value of the subprocess is actually (C<$? E<gt>E<gt> 8>), and
@@ -459,7 +459,7 @@ the syntax error "at"?)
 
 Note that warning messages are not collected in this variable.  You can,
 however, set up a routine to process warnings by setting C<$SIG{__WARN__}>
-below.
+as described below.
 
 =item $PROCESS_ID
 
@@ -531,7 +531,8 @@ multiple groups.
 =item $0
 
 Contains the name of the file containing the Perl script being
-executed.  Assigning to "C<$0>" modifies the argument area that the ps(1)
+executed.  On some operating systems
+assigning to "C<$0>" modifies the argument area that the ps(1)
 program sees.  This is more useful as a way of indicating the
 current program state than it is for hiding the program you're running.
 (Mnemonic: same as B<sh> and B<ksh>.)
@@ -552,24 +553,15 @@ discouraged.
 
 =item $]
 
-The string printed out when you say C<perl -v>.
-(This is currently I<BROKEN>).
-It can be used to
-determine at the beginning of a script whether the perl interpreter
-executing the script is in the right range of versions.  If used in a
-numeric context, returns the version + patchlevel / 1000.  Example:
-
-    # see if getc is available
-    ($version,$patchlevel) =
-	     $] =~ /(\d+\.\d+).*\nPatch level: (\d+)/;
-    print STDERR "(No filename completion available.)\n"
-	     if $version * 1000 + $patchlevel < 2016;
-
-or, used numerically,
+The version + patchlevel / 1000 of the Perl interpreter.  This variable
+can be used to determine whether the Perl interpreter executing a
+script is in the right range of versions.  (Mnemonic: Is this version
+of perl in the right bracket?)  Example:
 
     warn "No checksumming!\n" if $] < 3.019;
 
-(Mnemonic: Is this version of perl in the right bracket?)
+See also the documentation of C<use VERSION> and C<require VERSION>
+for a convenient way to fail if the Perl interpreter is too old.
 
 =item $DEBUGGING
 
@@ -704,7 +696,7 @@ the Perl script.  Here are some other examples:
     $SIG{"PIPE"} = Plumber();   # oops, what did Plumber() return??
 
 The one marked scary is problematic because it's a bareword, which means
-sometimes it's a string representing the function, and sometimes it's 
+sometimes it's a string representing the function, and sometimes it's
 going to call the subroutine call right then and there!  Best to be sure
 and quote it or take a reference to it.  *Plumber works too.  See L<perlsub>.
 
@@ -749,9 +741,9 @@ By default, running out of memory it is not trappable.  However, if
 compiled for this, Perl may use the contents of C<$^M> as an emergency
 pool after die()ing with this message.  Suppose that your Perl were
 compiled with -DEMERGENCY_SBRK and used Perl's malloc.  Then
- 
+
     $^M = 'a' x (1<<16);
- 
+
 would allocate a 64K buffer for use when in emergency.  See the F<INSTALL>
 file for information on how to enable this option.  As a disincentive to
 casual use of this advanced feature, there is no L<English> long name for