* emul_netbsd.c: Add support for missing system calls, and/or
missing stat fields.
+ (MAXPATHLEN): Undefine if including unistd.h, since sys/param.h
+ might define it.
* hw_pal.c (WITH_STDIO): Redefine if O_NDELAY, F_GETFL, or F_SETFL
are not defined.