use ldap_charray_*() instead of charray_*()

servers/slapd/back-bdb/attr.c

servers/slapd/back-bdb/dn2id.c

servers/slapd/back-dnssrv/referral.c

servers/slapd/back-dnssrv/search.c

servers/slapd/back-ldbm/attr.c

servers/slapd/back-shell/shell.h

servers/slapd/backend.c

servers/slapd/daemon.c

servers/slapd/libslapd.dsp

servers/slapd/oidm.c

servers/slapd/proto-slap.h

servers/slapd/root_dse.c

servers/slapd/sasl.c

servers/slapd/tools/slapadd.c