Stop having Unix defaults in Configure (partial)

Default values belong in the DEFAULT config target template, in
Configurations/00-base-templates.conf.

This isn't a complete move, but takes care of the most blatant
examples.
Reviewed-by: NTim Hudson <tjh@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5177)

Configurations/00-base-templates.conf

@@ -38,6 +38,8 @@ my %targets=(
 	shared_rcflag	=> "",
 	shared_extension	=> "",
 
+	hashbangperl	=> "PERL", # Only Unix actually cares
+
         build_scheme    => [ "unified", "unix" ],
         build_file      => "Makefile",
     },
@@ -61,12 +63,19 @@ my %targets=(
         inherit_from    => [ "BASE_common" ],
         template        => 1,
 
+        ar              => "ar",
+        arflags         => "r",
+        cc              => "cc",
         lflags          =>
             sub { $withargs{zlib_lib} ? "-L".$withargs{zlib_lib} : () },
         ex_libs         =>
             sub { !defined($disabled{zlib})
                   && defined($disabled{"zlib-dynamic"})
                   ? "-lz" : () },
+        hashbangperl    => "/usr/bin/env perl", # Only Unix actually cares
+        ranlib          => sub { which("$config{cross_compile_prefix}ranlib") ?
+                                     "\$(CROSS_COMPILE)ranlib" : "true"; },
+        rc              => "windres",
 
         build_scheme    => [ "unified", "unix" ],
         build_file      => "Makefile",

Configure

@@ -576,16 +576,6 @@ my %user_to_target = (
     LDFLAGS     => 'lflags',
     LDLIBS      => 'ex_libs',
    );
-my %user_defaults = (
-    AR          => 'ar',
-    ARFLAGS     => [ 'r' ],
-    CC          => 'cc',
-    CXX         => 'c++',
-    HASHBANGPERL=> '/usr/bin/env perl', # Only Unix actually cares
-    RANLIB      => sub { which("$config{cross_compile_prefix}ranlib") ?
-                             "\$(CROSS_COMPILE)ranlib" : "true"; },
-    RC          => 'windres',
-   );
 
 $config{openssl_api_defines}=[];
 $config{openssl_algorithm_defines}=[];
@@ -1158,8 +1148,6 @@ foreach (keys %user) {
     $config{$target_key} =
         $mkvalue->($ref_type, $user{$_})
         || $mkvalue->($ref_type, $target{$target_key});
-    $config{$target_key} ||=$mkvalue->($ref_type, $user_defaults{$_})
-        if exists $user_defaults{$_};
     if (defined $useradd{$_} && @{$useradd{$_}}) {
         if (defined $config{$target_key}) {
             push @{$config{$target_key}}, @{$useradd{$_}};