Perl: all known input headers are handled identically.

As all known input headers are now linked lists, these are now handled
identically.  In particular, this makes it possible to access properly
combined values of headers not specifically handled previously, such
as "Via" or "Connection".

src/http/modules/perl/nginx.xs

diff --git a/src/http/modules/perl/nginx.xs b/src/http/modules/perl/nginx.xs
index e2180e6..9e8a6a5 100644
--- a/src/http/modules/perl/nginx.xs
+++ b/src/http/modules/perl/nginx.xs
@@ -304,28 +304,10 @@
 
         if (hh->offset == offsetof(ngx_http_headers_in_t, cookie)) {
             sep = ';';
-            goto multi;
-        }
-#if (NGX_HTTP_X_FORWARDED_FOR)
-        if (hh->offset == offsetof(ngx_http_headers_in_t, x_forwarded_for)) {
+
+        } else {
             sep = ',';
-            goto multi;
         }
-#endif
-
-        ph = (ngx_table_elt_t **) ((char *) &r->headers_in + hh->offset);
-
-        if (*ph) {
-            ngx_http_perl_set_targ((*ph)->value.data, (*ph)->value.len);
-
-            goto done;
-        }
-
-        XSRETURN_UNDEF;
-
-    multi:
-
-        /* Cookie, X-Forwarded-For */
 
         ph = (ngx_table_elt_t **) ((char *) &r->headers_in + hh->offset);