Tidy up handling of memory map, and improve HDF file commenting.

src/e-server:
	* src/main.cpp: Include sstream.
	(platform_args): Deleted (replaced by platformArgs local to main.
	(show_memory_map): Deleted (replaced by doShowMemoryMap) local to
	main.
	(showMemoryMap): Created, based on code previously in main.
	(main): Make declaration of hdf_file local and change to hdfFile,
	make arg check use if-then-else structure, use stringstream to
	parse -Wpl, move code to show memory map to its own routine.