(ITS#5196) Documentation should indicate that slurpd is deprecated

Full_Name: Buchan Milne Version: REL_ENG_2_3 (post-2.3.38) OS: URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (196.15.129.131)

It is well known that slurpd is deprecated, and it has been removed from 2.4. However, many questions arise in various support fora (case in point, #ldap on irc.freenode.net) about setting up slurpd, and the documentation still covers slurpd, without noting that it is deprecated (which probably contributes to continued use of slurpd, even on 2.3).

A notice should be placed at least in the following places to this effect: -slurpd(8) -Admin guide chapter 14 -replica section of slapd.conf(5) -slapd.replog(5)