Fix the mips64el build: mips64el should use the mips64 directory, not the mips64el directory.
Nit: fix locking of p->p_state in procdesc_close().

According to <sys/proc.h>, this field needs to be locked with either the
p_mtx or the p_slock. In this case the damage was quite small. Instead
of being reaped, the process would just be reparented to init, so it
could be reaped from there.
find: Treat errno from fts_read() more carefully.

fts_read() leaves errno unchanged on EOF and sets it on error, so set errno
to 0 before calling it. Also, don't trust finish_execplus() to leave errno
unchanged.
Fix a typo. The function name is pdfork; not pfork.