Reconfigure PHP to use postfix as mailer

Makefile

@@ -32,6 +32,9 @@ all: postfix-service
 	sed -i 's/^#alias_maps = hash:\/etc\/aliases$$/alias_maps = hash:\/etc\/aliases/' /etc/postfix/main.cf
 	@echo "$$POSTFIX_SERVICE" > /lib/systemd/system/postfix.service
 	systemctl enable postfix.service
+	if [ -f "/etc/php.ini" ]; then \
+	    sed -i 's/^.*sendmail_path.*=.*/sendmail_path = "\/usr\/sbin\/sendmail -t -i"/' /etc/php.ini ; \
+	fi
 	rm -rf postfix-3.5.4
 
 postfix-service: