Bump to v6.6.0

* Cache more types of RR
* Cache IPv4 and IPv6 in raw
* Increase socket buffer size from 2k to 4k
* Improve CacheHT dispatching
* Add PROTOCOL type `*` for GroupFile
* Domain match `*` is with lower priority than conditional match
* Show more RR type info

main.c

@@ -23,7 +23,7 @@
 #include "timedtask.h"
 #include "domainstatistic.h"
 
-#define VERSION__ "6.5.4"
+#define VERSION__ "6.6.0"
 #define DESCRIPTIONS "DNSforwarder\nVersion: "VERSION__". License: GPL v3.\nTime of compilation: "__DATE__" "__TIME__".\n\n"
 
 static char     *ConfigFile;