- Removed the issuer_cn and subject_cn matches from
   check_ccert_access. Files: smtpd/smtpd_check.c,
   proto/postconf.proto.
 - Usability: the Postfix SMTP server now logs a warning when
   a configuration requests access control by client certificate,
   but "smtpd_tls_ask_clientcert = no".  Files: proto/postconf.proto,
   smtpd/smtpd_check.c
 - Cleanup: spellchecks, attributions. Files: HISTORY,
   auxiliary/name-addr-test/gethostbyaddr.c,
   auxiliary/name-addr-test/getnameinfo.c, proto/postconf.proto,
   global/haproxy_srvr.c, global/mail_version.h, global/map_search.c,
   global/map_search.h, postsuper/postsuper.c, smtp/smtp.c,
   smtp/smtp_misc.c, smtpd/smtpd.c, smtpd/smtpd_check.c,
   smtpd/smtpd_expand.h, tls/tls_client.c, tls/tls_server.c,
   tlsproxy/tlsproxy.c, trivial-rewrite/trivial-rewrite.h,
   util/byte_mask.c, util/vstream_tweak.c.
 - Cleanup: bitrot in tests. File: cleanup/cleanup_milter.c.
 - Cleanup: harmless memory leak in postconf. File:
   postconf/postconf_master.c.
 - Bugfix (introduced: Postfix 2.3): panic with Postfix
   multi-Milter configuration during MAIL FROM. Milter client
   state was not properly reset after one of the Milters failed.
   Reported by WeiYu Wu.
 - Cleanup: replace "(whatever *) 0" with meaningfully-named
   constants. Sheesh. File: smtpd/smtpd.c.
   Documentation: BASIC_CONFIGURATION_README example default
   setting was not updated after Postfix 3.0 change. File:
   proto/BASIC_CONFIGURATION_README.html
 - Cleanup: normalize the IP address string forms received with
   XCLIENT, XFORWARD, and HaProxy, for consistency with address
   information for direct connections to Postfix, and add unit
   tests. This casefolds and removes redundant nulls from the
   string representation of an IPv6 address, normalizes the
   "IPv6:" address prefix of RFC 2821 IPv6 address forms, and
   converts IPv4 address octets with leading zeros (octal form)
   into decimal form. Files: global/haproxy.c,
   global/normalize_mailhost_addr.[hc], smtpd/smtpd.c.
   Incompatibility: this may change the appearance of logging,
   and the way that check_client_access will match subnets of
   an IPv6 address.
 - Bugfix (introduced: Postfix 2.3): a censoring filter broke
   multiline Milter responses for header/body events. Problem
   report by Andreas Thienemann. Files: util/printable.c,
   util/stringops.h, smtpd/smtpd.c.
 - Bugfix (introduced: Postfix 3.3): "smtp_mx_address_limit = 0"
   no longer meant 'unlimited'. Problem report by Luc Pardon.
   File: smtp/smtp_addr.c.
 - Portability: to avoid a compile-time error on Solaris, added
   "#undef sun" to util/unix_dgram_connect.c.