Adjust max squid cache time also for tftp metadata

Author: aaannz

containers/proxy-squid-image/squid.conf

@@ -41,7 +41,7 @@ refresh_pattern /saltboot/.*$ 10080 100% 525600 ignore-no-store ignore-reload ig
 # kernel and initrd are tied to images, will never change as well
 refresh_pattern /tftp/images/.*$ 10080 100% 525600 ignore-no-store ignore-reload ignore-private
 # rest of tftp are config files prone to change frequently
-refresh_pattern /tftp/.*$ 0 1% 1440 reload-into-ims refresh-ims
+refresh_pattern /tftp/.*$ 0 1% 5 reload-into-ims refresh-ims
 refresh_pattern 	.		0	100%	525600
 
 # secure squid