authdb: implement basics

Implement a shared memory based authentication cache. It's a simple
local cache indexed by IP-address, and keeps track of that IP's
auth info such as username, allowed categories and timeouts. This
provides basis for captive portal, per-user definable category
restrictions and implementation of soft blocks (block which can
be overridden by user by clicking a button on the blocked page).

1 files changed, 2 insertions, 2 deletions

diff --git a/filterdb.h b/filterdb.h
index 68c1a2a..2d16572 100644
--- a/filterdb.h
+++ b/filterdb.h
@@ -1,5 +1,5 @@
-#ifndef SQUARKDB_H
-#define SQUARKDB_H
+#ifndef FILTERDB_H
+#define FILTERDB_H
 
 #include <stddef.h>
 #include <stdint.h>