PI.UPGRADE special file

Simply, if this file is created ( Opened, closed ), then the tipi services on the PI will upgrade.

This will run the post upgrade script even if there is no change, which will in the very least restart all of the tipi oriented services. It may also perform numerious expensive initialization operations if no upgrade was necessary.

BASIC example:

10 OPEN #1:"PI.UPGRADE",OUTPUT,DISPLAY 
30 CLOSE #1
40 PRINT "PI UPGRADE INITIATED."