[krbdev.mit.edu #7977] git commit

[Tom Yu via RT]

Support unlocked iteration in DB2

Add support to the DB2 KDB back end to optionally release the lock
when calling the iterator callback.  This prevents the blocking of
other processes when dumps of large databases are taking place.

Also add support for reversed iteration.

https://github.com/krb5/krb5/commit/c35e3316423af7b806c9f8971a0cce5e0d4c893f
Author: Tom Yu <tlyu at mit.edu>
Commit: c35e3316423af7b806c9f8971a0cce5e0d4c893f
Branch: master
 src/include/k5-int.h          |    1 +
 src/plugins/kdb/db2/kdb_db2.c |  196 ++++++++++++++++++++++++++++++++++++-----
 src/plugins/kdb/db2/kdb_db2.h |    1 +
 3 files changed, 175 insertions(+), 23 deletions(-)