[patch] lxr-0.3.1 handle `_' fix

["Coywolf Qi Hunt" <coywolf@lovecn.org>]

Hello,

lxr-0.3.1 can not handle '_' in the Architecture variable.

Like <http://sosdg.org/~coywolf/lxr/source/include/asm-x86_64/?a=x86_64>
is wrongly shown as <http://sosdg.org/~coywolf/lxr/source/include/asm-/?a=x86_64>

This problem was brought in by the file exposure security fix some time ago iirc. 

		Coywolf

diff -pu lxr/http/lib/LXR/Config.pm.orig lxr/http/lib/LXR/Config.pm
--- lxr/http/lib/LXR/Config.pm.orig	2005-04-29 23:35:26.000000000 +0800
+++ lxr/http/lib/LXR/Config.pm	2005-04-29 23:37:28.000000000 +0800
@@ -156,7 +156,7 @@ sub varrange {
 sub varexpand {
     my ($self, $exp) = @_;
     $exp =~ s{\$\{?(\w+)\}?}{
-       $self->{variable}->{$1} =~ /^([a-zA-Z0-9\.\-]*)$/ ? $1 : ''
+       $self->{variable}->{$1} =~ /^([a-zA-Z0-9\.\-_]*)$/ ? $1 : ''
        }ge;
     return($exp);
 }
-
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