bind: bump to 9.18.1

Fixes multiple security issues:

 * CVE-2022-0667 -- An assertion could occur in resume_dslookup() if the
                    fetch had been shut down earlier
 * CVE-2022-0635 -- Lookups involving a DNAME could trigger an INSIST when
                    "synth-from-dnssec" was enabled
 * CVE-2022-0396 -- A synchronous call to closehandle_cb() caused
                    isc__nm_process_sock_buffer() to be called recursively,
                    which in turn left TCP connections hanging in the CLOSE_WAIT
                    state blocking indefinitely when out-of-order processing was
                    disabled.
 * CVE-2021-25220 -- The rules for acceptance of records into the cache
                     have been tightened to prevent the possibility of
                     poisoning if forwarders send records outside the
                     configured bailiwick

Signed-off-by: Noah Meyerhans <frodo@morgul.net>

net/bind/Makefile

@@ -9,7 +9,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=bind
-PKG_VERSION:=9.18.0
+PKG_VERSION:=9.18.1
 PKG_RELEASE:=$(AUTORELEASE)
 USERID:=bind=57:bind=57
 
@@ -22,7 +22,7 @@ PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:= \
 	https://www.mirrorservice.org/sites/ftp.isc.org/isc/bind9/$(PKG_VERSION) \
 	https://ftp.isc.org/isc/bind9/$(PKG_VERSION)
-PKG_HASH:=56525bf5caf01fd8fd9d90910880cc0f8a90a27a97d169187d651d4ecf0c411c
+PKG_HASH:=57c7afd871694d615cb4defb1c1bd6ed023350943d7458414db8d493ef560427
 
 PKG_FIXUP:=autoreconf
 PKG_REMOVE_FILES:=aclocal.m4 libtool.m4