Error handling in check-date-http

[ilario]

Running check-date-http on a two nodes mesh with no internet connection results in this error:

/usr/bin/lua: /usr/bin/check-date-http:49: attempt to index local 'algo' (a number value)
stack traceback:
	/usr/bin/check-date-http:49: in main chunk
	[C]: ?

this means that checking for the success variable here

lime-packages/packages/check-date-http/files/usr/bin/check-date-http

Lines 44 to 45 in 50656f6

	if(not success) then
	print(arg[0], "HTTP request failed", url, success, response, algo)

is not enough to assure that the connection was good.

[ilario]

The solution would be to check if the content of algo['headers']['Date'] is a valid date, and to remove the current check.