Move cache driver setup to config and allow forcing no cache with envvar

gistfile1.txt

diff --git a/lib/Reisegiganten.pm b/lib/Reisegiganten.pm
index 31fd492..5614df3 100644
--- a/lib/Reisegiganten.pm
+++ b/lib/Reisegiganten.pm
@@ -188,7 +188,7 @@ sub setup_attrs {
     my ($self) = @_;
 
     $self->attr( 'db_config'   => sub { RG::Config->new; });
-    $self->attr( 'cache'       => sub { CHI->new( driver => 'FastMmap', cache_size => '10m', root_dir => '/tmp/mmap_' . __PACKAGE__, expire_time => '10m', expires_in => '10 min', expires_variance => 0.1 )});
+    $self->attr( 'cache'       => sub { CHI->new( $ENV{NO_CACHE} ? ( Driver => 'Null' ) : $self->config->{cache} ) });
     $self->cache->clear unless $ENV{KEEP_CACHE};
     $self->attr( 'db_model'    => sub { Reisegiganten::DBModel->new; });
     $self->attr( 'rg_supplier' => sub { RG::Supplier->new; });
diff --git a/share/reisegiganten.conf b/share/reisegiganten.conf
index cc9ec41..5fa38aa 100644
--- a/share/reisegiganten.conf
+++ b/share/reisegiganten.conf
@@ -162,3 +162,16 @@ destination_news http://nyheter.destination.se/feed
     flight     flight
     lms        lms
 </seo2cms>
+
+<cache>
+    <l1_cache>
+       driver FastMmap
+       cache_size 10m
+       root_dir /tmp/mmap_reisegiganten
+       expire_time 10m
+       expires_in  10 min
+       expires_variance 0.1
+    </l1_cache>
+    driver Memcached::libmemcached
+    servers dev:11211
+</cache>