Fixed breakage of my world in rev.1.30. #include <sys/time.h> instead of

Fixed breakage of my world in rev.1.30.  #include <sys/time.h> instead of
depending on namespace pollution in <sys/stat.h> for the declarations of
struct timeval and utimes().

Fixed some style bugs in rev.1.30 and some nearby style bugs (mainly
unsorting and missing or extra blank lines).

Removed a wrong comment that was obtained from NetBSD in rev.1.14.  It said
that chflags() reset the times that were set "above" by utimes(), but
utimes wasn't "above" in FreeBSD until rev.1.30, and chflags() does't
actually reset the times.