-Activate const PRODUCT_USE_OLD_PATH_FOR_PHOTOS by default for old

instances
-Update changelog for 3.7.1

Conflicts:
	ChangeLog
	htdocs/install/mysql/migration/3.6.0-3.7.0.sql

ChangeLog

@@ -42,6 +42,11 @@ Dolibarr better:
   "addreplace" hooks, so you must return content with "->resprints='mycontent'" and not with "return 'mycontent'"  
 - All fields "fk_societe" were renamed into "fk_soc".
 
+***** ChangeLog for 3.7.1 compared to 3.7.* *****
+- Fix: Bug in the new photo system
+- Fix: Error management
+- Fix: [ Bug #2714 ] Members -> Memberxy-> Agenda -> technical Error
+- Fix: [ Bug #2713 ] 3.7.0 mailing-unsubscribe.php not unsubscribe
 
 ***** ChangeLog for 3.7 compared to 3.6.* *****
 For users:

htdocs/install/mysql/migration/3.6.0-3.7.0.sql

@@ -1180,3 +1180,5 @@ insert into llx_c_tva(rowid,fk_pays,taux,recuperableonly,localtax1,localtax1_typ
 insert into llx_c_tva(rowid,fk_pays,taux,recuperableonly,localtax1,localtax1_type,localtax2,localtax2_type,note,active) values (212, 21,  '18','0',7.5,2,0,0,'IVA standard rate',1);
 
 ALTER TABLE llx_livraison MODIFY COLUMN date_delivery DATETIME NULL DEFAULT NULL;
+
+INSERT INTO llx_const (name, value, type, note, visible, entity) values ('PRODUCT_USE_OLD_PATH_FOR_PHOTO','1','chaine','Use old path for products images',1,1);
\ No newline at end of file