#include <stdlib.h> to get malloc & co various places,
#include <ac/string.h> to get strlen & co in (liblutil/setproctitle.c),
declare ch_malloc & co (slurp.h), avl_find_lin (avl.h), Malloc (ud/edit.c).
Also changed ch_malloc & co from char* to void* functions.
Modified clients to reduce use of ldapconfig.h.edit.
ldap_{get,set}_option support is relatively complete. Needs
to be extended to support other "features" of OpenLDAP.
updated clients to use ldap_get/set_options
ld_options is renamed ld_booleans. ldap-int.h has accessor macros.
updated libldap to use new accessor macros.
