thread entrypoints:
(lwpSelect, shutdown_sequence): Parameters didn't match thread entry
point prototype.
(lwpEntryPoint): Arguments didn't match thread entry point prototype.
Change linkage of functions without prototype declaration to static
where possible.
Remove some superflous declarations, replace others by suitable
includes.
information on military. Closes#750533. Why? Wandering che pick a
sector with minimal military from the adjacent sectors that can get
che. Ties are broken in favour of the first sector examined. Since
sectors are examined in the order given by by diroff[], che prefer
directions with low index in diroff[]. This tends to channel che
towards the northeast. But the change makes ties very unlikely.
effect. Replace calls by struct assignment where possible. Replace
clear buffer, copy string to buffer by strncpy(). Use assignment to
clear when that's clearer. Replace overlapping copy through bounce
buffer by memmove(). Replace rest by standard memset() and memcpy().
Also use sizeof() instead of literal array sizes for robustness, and
instead of symbolic array sizes for clarity.
