Structs starting with `w' in bsd4-4

• wait4_args sys/syscallargs.h:36
• wait_args kern/kern_exit.c:262
• walkarg net/rtsock.c:53
• we_ring i386/isa/if_wereg.h:69
• wer_status i386/isa/if_wereg.h:70
• we_softc i386/isa/if_we.c:98
• winsize sys/ttycom.h:55
• write_args sys/syscallargs.h:20
• writev_args sys/syscallargs.h:534
• wtstatus i386/isa/wt.c:230