(main_argp_parser): Use the right default

file name.
(get_dev_mem): #if:ed out this code, it's dangerous on some
systems.
(get_system): Implemented this, including reading some /proc
files. Implemented
(get_interact): Implemented.
(main): Move locking later, until we want to write the file.
Implemented the actual writing of the seed-file data.

Rev: src/lsh-make-seed.c:1.5