Remove some lingering references to libbind9

Clean up the `.clang-format` #include priority list and
the `\file` declaration in `isc/getaddresses.h`.

.clang-format

@@ -50,8 +50,6 @@ IncludeCategories:
     Priority:        35
   - Regex:           '^<irs/'
     Priority:        40
-  - Regex:           '^<bind9/'
-    Priority:        45
   - Regex:           '^<(dig|named|rndc|confgen|dlz)/'
     Priority:        50
   - Regex:           '^<dlz_'

.clang-format.headers

@@ -44,8 +44,6 @@ IncludeCategories:
     Priority:        5
   - Regex:           '^<ns/'
     Priority:        6
-  - Regex:           '^<bind9/)'
-    Priority:        7
   - Regex:           '^(<[^/]*)/)'
     Priority:        8
   - Regex:           '^<tests/'

lib/isc/include/isc/getaddresses.h

@@ -13,7 +13,7 @@
 
 #pragma once
 
-/*! \file bind9/getaddresses.h */
+/*! \file isc/getaddresses.h */
 
 #include <isc/lang.h>
 #include <isc/net.h>