ITS#503: Extend ldap tools to support SASL/TLS

clients/tools/ldapdelete.c

clients/tools/ldapmodify.c

clients/tools/ldapmodrdn.c

clients/tools/ldappasswd.c

clients/tools/ldapsearch.c

doc/man/man1/ldapdelete.1

doc/man/man1/ldapmodify.1

doc/man/man1/ldapmodrdn.1

doc/man/man1/ldappasswd.1

doc/man/man1/ldapsearch.1

include/ldap.h

include/ldap_pvt.h

libraries/libldap/init.c

libraries/libldap/ldap-int.h

libraries/libldap/options.c

libraries/libldap/sasl.c