IBM Release 1.93 manual NB Hosts are identified by their hostname as specified by the

	/* <optional_comment>
	<IP> <name> <port> <CPUs> <speed> <RAM MB> <Arch> <OS>
	e.g. for a Thinkpad T23 laptop,
	/* Kukla--1.13 GHz PIII
	127.0.0.1 localhost 1066 1 1.0 768 X86 OS/2 4.5
	The port number is used for FIDO supervisory control, i.e. if this
	host is supervising N other hosts, those N connect to the supervisor
	using this port number. This port can be anything that doesn’t
	conflict with another service on the same cluster, but the unofficial
	"well-known" port for POEMS is 1066. All hosts can use the same
	port number.
	NB: Hosts are identified by their hostname (as specified by the
	$HOSTNAME environment variable, rather than by IP address. This
	makes it possible to test cluster simulations on a single host by adding
	multiple names for the same host in the hostfile, and specifying different
	aliases in different SUBDOMAIN statements in the parameters file.
	Cluster script fidossl sets the HOSTNAME variable for each fido instance,
	which means that the host’s predefined hostname is not used.
MACDEF	Define a user macro. Macros are parametrized groups of POEMS
	statements, as opposed to functions, which compute numeric values.
	Macros are defined and expanded much like C preprocessor macros,
	except for the MACDEF and MACRO keywords. A macro
	definition must consist of a single logical line (i.e. if it spans more
	than one line in the source file, line continuation characters must be
	used to concatenate them into one logical line). Semicolons must be
	used to separate individual POEMS statements within the logical line.
	Both numeric and string values can be passed as macro parameters.
	Macros do not have local variables other than their pass parameters-
	-other symbolic names will have their normal meaning from the
	local context at the time of macro expansion. Macro parameter
	names are dummy variables and will not collide with variables of
	the same name in the local context--context variables with the same
	name as the dummy will be inaccessible.
	Macros are allowed to contain macros, i.e. the MACRO statement is
	permitted inside a MACDEF. (This is a powerful and dangerous
	feature.) Macro recursion is not supported. NB: Since POEMS
	comments always extend to the end of the current line, any
	comments inside a macro definition must be at the end of a lexical
	line, following the line continuation character, as shown below.
	Syntax: MACDEF name(arg1, ..., argN) <logical line of code>
	Example: This macro plots field files over a fixed volume, with a

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