added rdn_attrs: parses a rdn and returns types and values in two arrays (honors '+' separator according to RFC 2253)

for LDBM backends called "dbsync", which takes minimum of one argument up
to 3 args which are sync frequency, # of delays, and delay periods.  See
man page update for "dbsync" configuration for more details.

Needs to be connection specific

need to rework cert check to use per lconn host name