(ITS#5825) syncrepl default is no retry

[ando@sys-net.it]

Full_Name: Pierangelo Masarati
Version: irrelevant
OS: irrelevant
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (82.63.140.131)
Submitted by: ando


Syncrepl by default uses no retry.  This is extremely useless, as syncrepl with
no retry will probably break, sooner or later, without notifying why it
happened.

I believe it would be safe to have either:

- a "safe" retry value (not too often, e.g. every hour, forever)

- a warning (or an error) if retry is not given when configuring syncrepl

Another interesting feature would be to register syncrepl-specific parameters in
back-monitor's entry of each database, that

- show the status of syncrepl (whether it's up, if rp)

- show the timestamp of the last successful refresh

- show the timestamp of the last failed attempt, and the reason of the failure

p.