Configure: Reorganise the checking of disabled options

The way we figured out what options are crypto algorithms and what are
something other was somewhat sketchy.  This change bases the
distinction on available sdirs instead.
Reviewed-by: NRich Salz <rsalz@openssl.org>

Configure

@@ -863,33 +863,34 @@ foreach (sort (keys %disabled))
 		@{$config{dirs}} = grep !/^engines$/, @{$config{dirs}};
 		@{$config{sdirs}} = grep !/^engine$/, @{$config{sdirs}};
 		push @{$config{openssl_other_defines}}, "OPENSSL_NO_ENGINE";
+		print " OPENSSL_NO_ENGINE (skip engines)";
 		}
 	else
 		{
-		my ($ALGO, $algo);
-		($ALGO = $algo = $_) =~ tr/[\-a-z]/[_A-Z]/;
+		my ($WHAT, $what);
 
-		if (/^asm$/ || /^err$/ || /^hw$/ || /^hw-/ || /^async$/
-				|| /^autoalginit/ || /^autoerrinit/)
+		($WHAT = $what = $_) =~ tr/[\-a-z]/[_A-Z]/;
+
+		# Fix up C macro end names
+		$WHAT = "RMD160" if $what eq "ripemd";
+
+		# fix-up crypto/directory name(s)
+		$what = "ripemd" if $what eq "rmd160";
+		$what = "whrlpool" if $what eq "whirlpool";
+
+		if (grep { $_ eq $what } @{$config{sdirs}})
 			{
-			push @{$config{openssl_other_defines}}, "OPENSSL_NO_$ALGO";
-			print " OPENSSL_NO_$ALGO";
+			push @{$config{openssl_algorithm_defines}}, "OPENSSL_NO_$WHAT";
+			@{$config{sdirs}} = grep { $_ ne $what} @{$config{sdirs}};
 
-			if (/^err$/)	{ push @user_defines, "OPENSSL_NO_ERR"; }
+			print " OPENSSL_NO_$WHAT (skip dir)";
 			}
 		else
 			{
-			($ALGO,$algo) = ("RMD160","rmd160") if ($algo eq "ripemd");
+			push @{$config{openssl_other_defines}}, "OPENSSL_NO_$WHAT";
+			print " OPENSSL_NO_$WHAT";
 
-			push @{$config{openssl_algorithm_defines}}, "OPENSSL_NO_$ALGO";
-			print " OPENSSL_NO_$ALGO";
-
-			# fix-up crypto/directory name(s)
-			$algo="whrlpool" if $algo eq "whirlpool";
-			$algo="ripemd" if $algo eq "rmd160";
-			@{$config{sdirs}} = grep { $_ ne $algo} @{$config{sdirs}};
-
-			print " (skip dir)";
+			if (/^err$/)	{ push @user_defines, "OPENSSL_NO_ERR"; }
 			}
 		}