Remove TLS hard as an ldap.conf option as being not a over-writable
default.  The appropriate way to request ldaps:// is use an ldaps://
URI.  A rewrite to only sent hard for the default URIs but ignored
if the application provides it own URI would be acceptable.

search does not return error when base entry is not found

slapd-sycnrepl-slave-refresh.conf : renamed from slapd-syncrepl-slave.conf

test017-syncreplication         : renamed to test017-syncreplication-refresh

Otherwise slapd would break if SLAPD_MONITOR_DN contained a '%'.

an EOF will return with the previously set errno value.

URI should be used instead.

  For ITS#2482:
  added sl_is_mute flag to Listener - when set, the listener is ignored
  if accept() on a listener fails with EMFILE, set the sl_is_mute flag
  when removing a connection, if emfile != 0, look for a listener to unmute

  For ITS#2374:
  if global_idletimeout is set and there are active sessions, use a timeout
  on the select() to actively detect idle sessions.

add create/modify timestamp to all entries; use monitorTimestamp for start/current time; minor cleanup