Added public files
Roughly added all public files. Probably missed some, though.
diff --git a/doc/master/slow_shut_down b/doc/master/slow_shut_down
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+SYNOPSIS
+ void slow_shut_down(int minutes)
+
+DESCRIPTION
+ Schedule a shutdown for the near future. minutes is the
+ desired time in minutes till the shutdown:
+ six, if just the user reserve has been put into use.
+ one, if the (smaller) master reserve has been put into use as
+ well.
+
+ The interpreter calls this function when it runs low on
+ memory. At this time, it has freed its reserve, but since it
+ won't last long, the interpreter needs to be shut down. The
+ delay is to give the users the opportunity to finish their
+ current tasks, but don't take the 'minutes' for granted, just
+ deduce the urgency from it.
+ It is possible that the driver may reallocate some memory
+ after the function has been called, and then run again into a
+ low memory situation, calling this function again.
+ This function might load an 'Armageddon' object and tell it
+ what to do. It is the Armageddon object then which performs
+ the shutdown.
+
+ Technical: The memory handling of the interpreter includes
+ three reserved areas: user, system and master. All three are
+ there to insure that the system shuts down gracefully when the
+ memory runs out: the user area to give the users time to
+ quit normally, the others to enable emergency-logouts when the
+ user reserve is used up as well.
+ The areas are allocated at start of the interpreter, and
+ released when no more memory could be obtained from the host.
+ In such a case, one of the remaining areas is freed (so the
+ operation can continue a short while) and a garbage collection
+ is initiated. If the garbage collection recycles enough memory
+ (either true garbage or by the aid of the quota_demon) to
+ reallocate the areas, all is fine, else the system shut down
+ is invoked by a call to this function.
+
+SEE ALSO
+ quota_demon(M), notify_shutdown(M), shutdown(E), malloc(D), memory(C)