Add nonstd cbind SASL secprop

For Cyrus SASL 2.2, https://github.com/cyrusimap/cyrus-sasl/commit/8735185e9d5550e0f11e1ce4b77e391a16e4145b

doc/man/man3/ldap_get_option.3

@@ -545,6 +545,7 @@ Legal values are:
 .BR passcred ,
 .BR forwardsec ,
 .BR noanonymous ,
+.BR nonstdcbind ,
 .BR minssf=<minssf> ,
 .BR maxssf=<maxssf> ,
 .BR maxbufsize=<maxbufsize> .

libraries/libldap/cyrus.c

@@ -821,6 +821,9 @@ static struct {
 	{ BER_BVC("passcred"), SASL_SEC_PASS_CREDENTIALS, 0, 0 },
 	{ BER_BVC("forwardsec"), SASL_SEC_FORWARD_SECRECY, 0, 0 },
 	{ BER_BVC("noanonymous"), SASL_SEC_NOANONYMOUS, 0, 0 },
+#ifdef SASL_SEC_NONSTD_CBIND
+	{ BER_BVC("nonstdcbind"), SASL_SEC_NONSTD_CBIND, 0, 0 },
+#endif
 	{ BER_BVC("minssf="), 0, GOT_MINSSF, 0 },
 	{ BER_BVC("maxssf="), 0, GOT_MAXSSF, INT_MAX },
 	{ BER_BVC("maxbufsize="), 0, GOT_MAXBUF, 65536 },