Update SASL Support

fix compiler warnings by including ac/unistd.h and only declaring copy_hostent() when we actually need to use it

s/LDAP_PF_UNIX/LDAP_PF_LOCAL/ so that we actually declare ldap_connect_to_path(). Also fix the decleration to match the function

+       Fixed -lldap SASL got_max_ssf bug
+       Fixed -lldap TCP_NODELAY bug
+       Fixed -llutil sa_flags never set bug
+       Removed lint
plus
	clients/tools ldap_init() fixes
	-lldap SASL fixes
	binary syntax ";binary" transfer change