Fixed: [ bug #1570 ] Negative supplier invoices do not appear in bank
planned transactions.
ssl option is set to CURL_SSLVERSION_TLSv1.
Some site disabled ssl v1 to 3 (ex: paypal).
Merge remote-tracking branch 'origin/3.6' into 3.7

Conflicts:
	htdocs/compta/bank/treso.php