[SSSD] [PATCH] Make TTL configurable for dynamic dns

[James Hogarth]

Hi all,

Following the discussion previously for #1476 attached is a patch to
current master that does the following:

1) If there is no value in sssd.conf it assumes a default of 1200 to
fall in line with the current IPA code
 2) Adds a new option to sssd.conf - ipa_dyndns_ttl - which is an
integer in seconds for the TTL of the record

I've tested this on F17 with nothing set and with a few different
integers set and verified on IPA (via ipa dnsrecord-show --all) that
the TTL has been set correctly.

Comments would be most welcome :)

Kind regards,

James