U393 - unix hangups in endgame

Unix code does not always go thru hangup() when EOF is encountered.
There is a similar end_of_input() that is sometimes called instead, which
was missing a test of program_state.something_worth_saving.

doc/fixes34.2

@@ -108,6 +108,7 @@ win32: some code in files.c was incorrectly assuming that a file
 tiles: high priest tile had a couple bad pixels
 tiles: bad pixels in Croesus and Yeenoghu tiles
 FreeBSD: incorrect srandom declaration
+unix: don't autosave if hangup occurs after game is over
 
 
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