allow "perl" inside "limit_except"

src/http/modules/perl/ngx_http_perl_module.c

diff --git a/src/http/modules/perl/ngx_http_perl_module.c b/src/http/modules/perl/ngx_http_perl_module.c
index fb16420..29296b6 100644
--- a/src/http/modules/perl/ngx_http_perl_module.c
+++ b/src/http/modules/perl/ngx_http_perl_module.c
@@ -86,7 +86,7 @@
       NULL },
 
     { ngx_string("perl"),
-      NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF|NGX_CONF_TAKE1,
       ngx_http_perl,
       NGX_HTTP_LOC_CONF_OFFSET,
       0,