Revert to anychar in hat tries.

7-bit ASCII is not enough to cover corner cases and potentially
harmful qnames.

Change-Id: I83a5af63e7ab3d2ce87c7b5063e55f1a1a6c2e1e

src/common/hattrie/hat-trie.h

@@ -32,7 +32,7 @@ typedef void* value_t;         /* User pointers as value. */
 #define AHTABLE_INIT_SIZE 1024
 #define TRIE_ZEROBUCKETS  0    /* Do not use hash buckets (pure trie). */
 #define TRIE_BUCKET_SIZE  1536 /* Reasonably low for ordered search perf. */
-#define TRIE_MAXCHAR      0x7f /* Use 7-bit ASCII alphabet. */
+#define TRIE_MAXCHAR      0xff /* Use 7-bit ASCII alphabet. */
 
 typedef struct hattrie_t_ hattrie_t;