Reimplementation of prefix sets.

Prefix sets were broken beyond any repair and have to be reimplemented.
They are reimplemented using a trie with bitmasks in nodes.
There is also change in the interpretation of minus prefix pattern,
but the old interpretation was already inconsistent with
the documentation and broken.

There is also some bugfixes in filter code related to set variables.

1 files changed, 1 insertions, 0 deletions

diff --git a/conf/confbase.Y b/conf/confbase.Y
index e6401f47..43854623 100644
--- a/conf/confbase.Y
+++ b/conf/confbase.Y
@@ -34,6 +34,7 @@ CF_DECLS
   struct f_inst *x;
   struct filter *f;
   struct f_tree *e;
+  struct f_trie *trie;
   struct f_val v;
   struct f_path_mask *h;
   struct password_item *p;