Add catch_workers_output to php-rainloop.conf

webmails/rainloop/config/php-rainloop.conf

@@ -3,6 +3,11 @@
 ; pool name ('rainloop' here)
 [rainloop]
 
+; Redirect worker stdout and stderr into main error log. If not set, stdout and 
+; stderr will be redirected to /dev/null according to FastCGI specs. 
+; Default value: no. 
+catch_workers_output = 1
+
 ; Unix user/group of processes
 ; Note: The user is mandatory. If the group is not set, the default user's group
 ;       will be used.