perl5.000 patch.0o: [address] a few more Configure and build nits.perl-5.000o

This patch addresses a few more Configure and build nits.  Full
details are given below, but the main hightligths are (slightly)
better support for nested extensions and DLD and AIX MakeMaker fixes.

Configure
        Detect MachTen.  Thanks to Mark Pease <peasem@primenet.com>.
        Delete some tabs that caused a MachTen /bin/sh core dump!
        Detect extensions nested 1 level deep, e.g.  Devel/DProf/DProf.xs

MANIFEST
MANIFEST.new
        Include new hints/machten.sh hint file.

Makefile.SH
        Document why we use ./makedir instead of mkdir.

U/Extensions.U
        Detect extensions nested 1 level deep, e.g.  Devel/DProf/DProf.xs

U/dist3_051.pat
        Include MachTen patches.

configpm
        Convert nested extension names from filesytem-dependent Devel/DProf
        to perl5's internal naming scheme Devel::DProf.

doio.c
        A dup-related buglet fix from Hallvard B. Furuseth 
        <h.b.furuseth@usit.uio.no>.

ext/DB_File/DB_File.pm
ext/DynaLoader/DynaLoader.pm
ext/Fcntl/Fcntl.pm
ext/GDBM_File/GDBM_File.pm
ext/POSIX/POSIX.pm
ext/Socket/Socket.pm
        Throw a qw() around @ISA elements to show "good style".

hints/machten.sh
        new file.

lib/ExtUtils/MakeMaker.pm
        Bump version number to 4.086.
        Fix AIX buglet -- needed to specify NAME.
        Linux/DLD/gcc-2.6.2:  We no longer load .sa libraries (except
        libm.sa, which is apparently still o.k. 
      
util.c
        Another dup-related buglet fix.

6 files changed, 6 insertions, 6 deletions

diff --git a/ext/DB_File/DB_File.pm b/ext/DB_File/DB_File.pm
index af56cc0548..4cff8da4a9 100644
--- a/ext/DB_File/DB_File.pm
+++ b/ext/DB_File/DB_File.pm
@@ -179,7 +179,7 @@ require TieHash;
 require Exporter;
 require AutoLoader;
 require DynaLoader;
-@ISA = (TieHash, Exporter, DynaLoader);
+@ISA = qw(TieHash Exporter DynaLoader);
 @EXPORT = qw(
         $DB_BTREE $DB_HASH $DB_RECNO 
 	BTREEMAGIC
diff --git a/ext/DynaLoader/DynaLoader.pm b/ext/DynaLoader/DynaLoader.pm
index 9a21dfd40b..2c375d0fd5 100644
--- a/ext/DynaLoader/DynaLoader.pm
+++ b/ext/DynaLoader/DynaLoader.pm
@@ -18,7 +18,7 @@ use Config;
 use Carp;
 use AutoLoader;
 
-@ISA=(AutoLoader);
+@ISA=qw(AutoLoader);
 
 
 # enable messages from DynaLoader perl code
diff --git a/ext/Fcntl/Fcntl.pm b/ext/Fcntl/Fcntl.pm
index d55d4e30bd..b18d1365e5 100644
--- a/ext/Fcntl/Fcntl.pm
+++ b/ext/Fcntl/Fcntl.pm
@@ -3,7 +3,7 @@ package Fcntl;
 require Exporter;
 require AutoLoader;
 require DynaLoader;
-@ISA = (Exporter, DynaLoader);
+@ISA = qw(Exporter DynaLoader);
 # Items to export into callers namespace by default
 # (move infrequently used names to @EXPORT_OK below)
 @EXPORT =
diff --git a/ext/GDBM_File/GDBM_File.pm b/ext/GDBM_File/GDBM_File.pm
index 99b6390e80..cf260b51fa 100644
--- a/ext/GDBM_File/GDBM_File.pm
+++ b/ext/GDBM_File/GDBM_File.pm
@@ -5,7 +5,7 @@ require TieHash;
 require Exporter;
 require AutoLoader;
 require DynaLoader;
-@ISA = (TieHash, Exporter, DynaLoader);
+@ISA = qw(TieHash Exporter DynaLoader);
 @EXPORT = qw(
 	GDBM_CACHESIZE
 	GDBM_FAST
diff --git a/ext/POSIX/POSIX.pm b/ext/POSIX/POSIX.pm
index f59b4c393a..24e09fc3eb 100644
--- a/ext/POSIX/POSIX.pm
+++ b/ext/POSIX/POSIX.pm
@@ -5,7 +5,7 @@ require Exporter;
 require AutoLoader;
 require DynaLoader;
 require Config;
-@ISA = (Exporter, DynaLoader);
+@ISA = qw(Exporter DynaLoader);
 
 $H{assert_h} =	[qw(assert NDEBUG)];
 
diff --git a/ext/Socket/Socket.pm b/ext/Socket/Socket.pm
index a129ec694e..8e6e097c0c 100644
--- a/ext/Socket/Socket.pm
+++ b/ext/Socket/Socket.pm
@@ -4,7 +4,7 @@ use Carp;
 require Exporter;
 require AutoLoader;
 require DynaLoader;
-@ISA = (Exporter, DynaLoader);
+@ISA = qw(Exporter DynaLoader);
 @EXPORT = qw(
 	AF_802
 	AF_APPLETALK