Merge partial and intermediate responses

clients/tools/ldapsearch.c

include/ldap.h

include/ldap_rq.h

libraries/libldap/error.c

libraries/libldap/extended.c

libraries/libldap/result.c

libraries/libldap/search.c

libraries/libldap_r/rq.c

servers/slapd/back-bdb/search.c

servers/slapd/connection.c

servers/slapd/proto-slap.h

servers/slapd/result.c

servers/slapd/slap.h

servers/slapd/syncrepl.c