(fl_sct_init, write_sects, file_sct_init, main): Do not initialize

(fl_sct_init, write_sects, file_sct_init, main): Do not initialize
sector and realm timestamps to current time.  It's not useful, and it
facilitates attacks against the PRNG.  This backs out fairland.c
rev. 1.27 and files.c rev. 1.31 and partly backs out files.c
rev. 1.38.