ITS#8538 - Update information on the interval keyword, as it affects refreshAndPersist in very specific circumstances

ITS#8521 - Updates to test to ensure it fails where it should fail and succeeds where it should succeed.
Reference ITS#8281 as well, since these are related

Emmanuel Dreyfus authored Oct 30, 2016 and Quanah Gibson-Mount committed Nov 29, 2016

OpenSSL removed old DES API which used des_* functions.
https://github.com/openssl/openssl/commit/24956ca00f014a917fb181a8abc39b349f3f316f



In order to link with libcrypto from recent OpenSSL releases, we need
to replace the older API des_* functions by the newer API DES_* functions.
Signed-off-by: Emmanuel Dreyfus <manu@netbsd.org>

check for enumerated delete that deletes all values

accesslog can alter the timestamp on contextCSN updates

broken in 2d5996ac
Was allowing tv_usec to exceed 999999

Fix id2entry_delete when deleting last multival entry in DB

Modify/replace was broken if attr didn't already exist

Check for PTHREAD_MUTEX_ROBUST_NP definition (this doesn't work
on Linux/glibc because they used an enum). Zero out mutex before
initing.

So any initializers in code predating sc_writewait
will find sc_private in the expected position.