This update for libheimdal fixes the following issues:

libheimdal was updated to version 7.7.0:

+ Bug fixes:

- PKCS#11 hcrypto back-end:

+ initialize the p11_module_load function list
+ verify that not only is a mechanism present but that its
mechanism info states that it offers the required
encryption, decryption or digest services

- krb5:

+ Starting with 7.6, Heimdal permitted requesting
authenticated anonymous tickets. However, it did not
verify that a KDC in fact returned an anonymous ticket
when one was requested.
+ Cease setting the KDCOption reaquest_anonymous flag when
issuing S4UProxy (constrained delegation) TGS requests.
+ when the Win2K PKINIT compatibility option is set, do not
require krbtgt otherName to match when validating KDC
certificate.
+ set PKINIT_BTMM flag per Apple implementation
+ use memset_s() instead of memset()

- kdc:

+ When generating KRB5SignedPath in the AS, use the reply
client name rather than the one from the request, so
validation will work correctly in the TGS.
+ allow checksum of PA-FOR-USER to be HMAC_MD5. Even if TGT
used an enctype with a different checksum. Per [MS-SFU]
2.2.1 PA-FOR-USER the checksum is always HMAC_MD5, and
that's what Windows and MIT clients send.
In Heimdal both the client and kdc use instead the
checksum of the TGT, and therefore work with each other
but Windows and MIT clients fail against Heimdal KDC.
Both Windows and MIT KDC would allow any keyed checksum
to be used so Heimdal client work fine against it.
Change Heimdal KDC to allow HMAC_MD5 even for non RC4
based TGT in order to support per-spec clients.
+ use memset_s() instead of memset()
+ Detect Heimdal 1.0 through 7.6 clients that issue
S4UProxy (constrained delegation) TGS Requests with the
request anonymous flag set. These requests will be
treated as S4UProxy requests and not anonymous requests.

- HDB:

+ Set SQLite3 backend default page size to 8KB.
+ Add hdb_set_sync() method

- kadmind:

+ disable HDB sync during database load avoiding
unnecessary disk i/o.

- ipropd:

+ disable HDB sync during receive_everything. Doing an
fsync per-record when receiving the complete HDB is a
performance disaster. Among other things, if the HDB is
very large, then one slave receving a full HDB can cause
other slaves to timeout and, if HDB write activity is
high enough to cause iprop log truncation, then also need
full syncs, which leads to a cycle of full syncs for all
slaves until HDB write activity drops.
Allowing the iprop log to be larger helps, but improving
receive_everything() performance helps even more.

- kinit:

+ Anonymous PKINIT tickets discard the realm information
used to locate the issuing AS. Store the issuing realm in
the credentials cache in order to locate a KDC which can
renew them.
+ Do not leak the result of krb5_cc_get_config() when
determining anonymous PKINIT start realm.

- klist:

+ Show transited-policy-checked, ok-as-delegate and
anonymous flags when listing credentials.

- tests:

+ Regenerate certs so that they expire before the 2038
armageddon so the test suite will pass on 32-bit
operating systems until the underlying issues can be
resolved.

- documentation:

+ rename verify-password to verify-password-quality
+ hprop default mode is encrypt
+ kadmind "all" permission does not include "get-keys"
+ verify-password-quality might not be stateless

Version 7.6.0:

+ Security (#555):

- CVE-2018-16860 Heimdal KDC: Reject PA-S4U2Self with unkeyed
checksum

When the Heimdal KDC checks the checksum that is placed on
the S4U2Self packet by the server to protect the requested
principal against modification, it does not confirm that
the checksum algorithm that protects the user name
(principal) in the request is keyed. This allows a
man-in-the-middle attacker who can intercept the request to
the KDC to modify the packet by replacing the user name
(principal) in the request with any desired user name
(principal) that exists in the KDC and replace the checksum
protecting that name with a CRC32 checksum (which requires
no prior knowledge to compute).
This would allow a S4U2Self ticket requested on behalf of
user name (principal) user@EXAMPLE.COM to any service to be
changed to a S4U2Self ticket with a user name (principal) of
Administrator@EXAMPLE.COM. This ticket would then contain
the PAC of the modified user name (principal).

- CVE-2019-12098, client-only:

RFC8062 Section 7 requires verification of the PA-PKINIT-KX
key exchange when anonymous PKINIT is used. Failure to do
so can permit an active attacker to become a
man-in-the-middle.

+ Bug fixes:

- Happy eyeballs: Don't wait for responses from
known-unreachable KDCs.

- kdc:

+ check return copy_Realm, copy_PrincipalName,
copy_EncryptionKey

- kinit:

+ cleanup temporary ccaches
+ see man page for "kinit --anonymous" command line syntax
change

- kdc:

+ Make anonymous AS-requests more RFC8062-compliant.
Updated expired test certificates

+ Features:

- kuser: support authenticated anonymous AS-REQs in kinit
- kdc: support for anonymous TGS-REQs
- kgetcred support for anonymous service tickets
- Support builds with OpenSSL 1.1.1