[krbdev.mit.edu #8765] git commit

[Greg Hudson via RT]

Add dns_canonicalize_hostname=fallback support

Turn dns_canonicalize_hostname into a tristate variable, allowing the
value "fallback" as well as the true/false booleans.  If it is set to
fallback, delay DNS canonicalization and attempt it only in
krb5_get_credentials() if the KDC responds that the requested server
principal name is unknown.

[ghudson at mit.edu: added TGS tests; refactored code; edited commit
message and documentation]

https://github.com/krb5/krb5/commit/6c20cb1c89acaa03db897182a3b28d5f8f284907
Author: Simo Sorce <simo at redhat.com>
Committer: Greg Hudson <ghudson at mit.edu>
Commit: 6c20cb1c89acaa03db897182a3b28d5f8f284907
Branch: master
 doc/admin/conf_files/krb5_conf.rst |    4 ++
 src/include/k5-int.h               |    8 +++-
 src/include/k5-trace.h             |    3 +
 src/lib/krb5/krb/get_creds.c       |   79 +++++++++++++++++++++++++++++++----
 src/lib/krb5/krb/init_ctx.c        |   27 ++++++++++++-
 src/lib/krb5/krb/t_copy_context.c  |    2 +-
 src/lib/krb5/os/os-proto.h         |    4 ++
 src/lib/krb5/os/sn2princ.c         |   19 +++++++--
 src/tests/gcred.c                  |    5 ++-
 src/tests/t_sn2princ.py            |   34 +++++++++++++++-
 10 files changed, 167 insertions(+), 18 deletions(-)